Do many of you change CPUs and not the motherboard? To return to what I said earlier, I usually wait about 5 years and swap out both, the advances being made in that time being significant enough to warrant change of both.
I wonder how many swap new processors onto older boards. Performance gains over a few generations (on like for like processors) have been relatively small recently.
I have been upgrading on the AM4 Ryzen family platform...
One of the areas of cost that tends to be overlooked is RAM - My previous home server platform had 16gb, my current one has 64Gb... upgrading the CPU performance will gain me little or nothing.
My main home PC is a HTPC / Media Centre - used for light gaming as well - it is on a fanless platform (HDPlex heatsink case) - so performance per watt is key, as is total TDP..., current RAM at 16Gb is adequate - and upgrade to the latest generation would gain me nothing, and require replacing MB, RAM and CPU.... it will be a few years before that is truly worthwhile.
When I moved from AM2+ to AM4 platform - I shifted my Phenom PC with 16Gb RAM into a secondary PC, used for occasional LAN gaming with my son - it still runs well, and is still capable of running most of what I use today.
Having said that - my NAS/Server is using a 2400G - and also runs as a Hyperv VM server - and it gets hammered once I load up a couple of VM's.... So I am looking at options with regards to putting a 5700g into there, I have a 4750G in my HTPC... and am potentially considering doing a trickle down - put a 5700 with a GPU, and then moving the 4750g to the server...
So yeah I upgrade CPU's within a generation... but I try to keep it to the end of a series - when the prices drop, to get the best bang for the buck