Not even when they changed from 20 to 24 pin? I know I bought one then and my previous PSU was nice so must have thought it necessary.
Wonder if I can manage to skip DDR4 entirely or fate will force me to buy the last of it meaning another expensive dead-end upgrade.
20 pin was easy to adapt to 24 with a $10 cable, same with the 4 and 8pin cpu header and GPU headers.
DDR2 was unusual, we had a flood that destroyed the fabs just as we switched to DDR3, this is why big DDR2 sticks are rare and relatively expensive.
DDR3 had a short life but a typical phaseout with boards supporting both DDR3 and DDR4, more than that, they still make it (someone did eventually restart a ddr2 fab, too little too late). The problem with the DDR3 phaseout was AMD wasn't in a good position performance-wise so it made little sense to buy once of these dual boards and switch to AMD. Intel often supports it, but only on extreme low end.
DDR4 will probably have a fantastic phaseout with boards from AMD likely supporting both for a while (you will need a compatible CPU though), more importantly though, DDR4 passed a milestone, the hardware far exceeded the software. A great many people bought 32 and even 64gigs of it, this extreme excess wasn't possible on DDR2, and only somewhat attainable on DDR3 but people with DDR4 went nuts with it because at times it was so cheap. As such even if you have DDR4, you will be able to get large amounts of it for CHEAP when it's finally phased out and performance-wise it won't be an issue for a while really. Don't stress DDR4.
How it will work on AMD (based on past experience) is you will get a newer board, it will have 2 slots of DDR4 and 2 slots DDR5, you slot in a current Ryzen or a new Athlon or Duron (one of the two is returning), it should support DDR4 and DDR5. Later, you upgrade cpu and ram if you have a current gen Ryzen or if you have a Duron/Athlon you upgrade just memory. It's not perfect but makes it a little easier. The new Athon/Duron will basically be a current gen Ryzen with updated microcode and a cheaper price. Performance will be similar to current gen Ryzen, which is a massive upgrade for someone on an older Intel.
Even if AMD doesn't didn't do the dual system, the current upper and even mid tier stuff won't be considered slow anytime soon. I hate to say outdated, because it's sort of a missnomer, yeah, it's past the prime, but do you really consider an 8700k or a Ryzen 2700 slow? Despite coming up on the end of DDR4, we're still in a fantastic spot in computing history in terms of longevity and bang for the buck.
Right now you can get a Ryzen 2600 and motherboard for under $200, toss in a decent GPU and that thing will keep trucking for a while. DDR5? Who cares. You have a pretty nice 6core/12 thread beast with plenty of memory. It's not going to be "slow" for quite a while.