Here is my point of view from musician (classical guitarist) perspective.
I used to have only one HomePod which I hated, but brought another one on the day after the news that it would be discontinued. I am now having a stereo paired HonePod which I love.
I initially brought only one on last year for causal listenin, after my Musical Fidelity amplifier was burnt. But to my ear, it sound really terrible or I even felt sad! Because the sound of classical guitar sound so bad, it’s mid was suck! The weakest link of the HomePod is the mid range, not to mention it‘s over emphasized bass. However it’s room filling 360 degtee sound is good and interesting.
A few days after my sadness, I then brought a pair of Studio Monitors (Mackie MR524) which is driven my old Airport Express to resolve my sadness. It is indeed very GOOD! Way better than the single HomePod and even my old Hi-Fi system! The guitar sound so much better - everything sound so CLEAR! I then realized that a Hi-Fi system really NOT what I need.
Few months ago, I been shocked from a news that the original HomePod would be disconnected. I then decided to buy another one to form a stereo pair as purpose of collection and Dolby Atoms sound system for my Apple TV.
The stereo paired HomePod sound so much BETTER than one indeed. You know, not 1+1=2 better, but WAY more!
The mid range no longer suck, although the bass is still a bit too much, but it has very WIDE sound stage (really room filling), comparing with my Mackie which gives more accurate and focus sound.
I am now using stereo HomePods for my main speaker system for casual music listening and video. I use Mackie for serious listening, such as musical analysis or monitoring for my own recording (Motu M4). More like a speaker for work while the HomePod for entertainment.
The verdict.
Go for it if you going to buy two of them but don’t consider it if only one, which in my opinion, two HomePod Mini sound better than one HomePod and cheaper. Yes, i addicted, I also brought two Mini for other rooms.