The fact is that most recommendations for gaming builds these days start at Ryzen5s or i5-7or8xxx because it's the newest and shiniest, parts are easy to get and are reasonably priced (and we all always want new/better/shiny...even if we never get close to the limits of those builds...). There are people still gaming on ancient i5/i7-2/3xxk's with great success (and darned if DDR3 RAM isn't (relatively) cheap!). If you like what you have, and it games well with what you play, incremental updates will work just fine.
The next big movement is going to be into normalizing 4k displays, so I think the next big thing (NBT) is going to be bigger/better/faster GPUs on motherboards with really, really fast buss speeds...and that's a jump...