Interesting,
My first reciever was a Pioneer my brothers gave me, I fixed the thing and used it for many years. First cassette deck and AVR was Onkyo and the cassette deck still works after 34 years. When the Onkyo AVR bit the dust, I looked at the chaos going on in the AVR world with Marantz, Denon, Harman Kardon, Onkyo, Pioneer and so on not being what they were in the 1990's. Hmmmm, so I went with Yamaha because they own the manufacturing plant and their stuff is screwed together by Yamaha employees. Figure if Yamaha can make pro gear, motorcycles, robots, car engines and musical instruments they should not screw up a receiver too bad. The reliability ratings were at the top, the thing ran cool and I knew Yamaha would be around before the warranty was up.
Fast forward a few years, at least the market is starting to stabilize. Sure, TCL bought them out but TCL also has been improving their product so not a bad thing. I'd rather them being purchased by a company that wants to and is improving their product VS a company that only cares about profits, market share and stock price.
From what I recall, Pioneer Professional was spun off a few years ago as Pioneer Pro dominates the global club mixer/club products arena. Those mixers used in EDM festivals, night clubs and concerts cost many thousands of dollars and handle abuse far higher than any consumer product ever will. I believe (but not sure) that TAD was spun off as a professional brand--could be wrong but it might already be owned by someone else. If it makes you feel better, Pioneer Pro is still kicking butt in the club mixer market although it has Denon Professional biting at it's heels. Denon Professional is NOT Denon...they got spun off also and is owned by somebody else. Me thinks Marantz Pro also got spun off--my crystal ball is cloudy on that one.
So if you want stability, get a Yamaha or Sony as they remain the same. Well, the problem with Sony is they can go world class IF they want to. They have the wonderous ability to make great gear or proprietary crap.... because Sony! I do know that Sony is closing their audio gear factories in Brazil and Malaysia which is not a very good sign... Yamaha's new AVRs are better than what they replaced so they seem to want to do battle with Sound United--a bright spot it seems.
I'd rather TCL buy out Onkyo/Pioneer than to see those brands go away. Now that Sony seems to be backing away from audio, the odds that two companies at the top taking a rest strongly increases. At least with TCL Onkyo/Pioneer, they know if they take a rest that TCL might see it as an opportunity to innovate and kick some butts. Samsung/Harman is the dark horse, they can easily jump in with Harman Kardon and crush Sound United at will. After all, if Samsung so chooses it can make it's own parts, processors and electronic bits in it's own foundries and really push things forward. Sound United is more an assembler and depends on parts avialable off-the-shelf. It has been over 4 years since Samsung bought out Harman, they really don't seem all that interested in AVRs as smart speakers, studio monitors, soundbars and car audio/nav is a much higher profit area. Samsung does have some interesting tech, they have a processor that predicts increasing distortion, frequency response issues and power compression and will change the signal in real time to prevent that from happening. Oddly enough, their beta testing of that tech was used in a sound bar but it does have opportunities. You can bet that JBL Professional will be using that once it becomes viable for large scale arena, pro sound and theater systems--it will trickle down. Right now, the pro sound market is toast although that does allow more R&D time.
Correct me if I'm wrong but the last I knew the top 3 TV manufacturers were Samsung, LG and TCL. For the most part, consumers are not very familiar with Onkyo but they do know Pioneer. Not sure what TCL will do with the brands, they will probably use them for soundbars and the like for their TVs--start with what you know. Hopefully they throw some money at them to move product and innovate but I'm not concerned. There is a site called ASR that will strap the gear down, plug it and and letter rip!
Could be worse..AudioQuest could of bought them! Ack!