RPi 5 and RPi 500 Plus does everything I need for a daily driver, so I can wait.
Pudge
my dream is a Pi with a DDR3L slot
yes, DDR3L is old and slow, but also dirt cheap, this is in my opinion the only way for a reasonably priced Pi in the near future
that being said, my Pi 4 does everything I need (not that it’s a lot)
Slot increase the complexity of the device, and also dramatically increase support’s workload.
i.e., they open entire new can of worms – instead of merely needing to support whatever is soldered on the SBC, you now need to support customers with whatever they decided to plug into the slot. Think of the list of tested RAM sticks that motherboard manufacturers provide. Even more so as in the current RAMageddon, a smaller portion of the users are going to buy brand-name modules from reputable vendors and more user are going to salvage whatever they can cheaply from wherever they can extract it (with sometime very dubious quality).
You’re more likely to see Raspberry expanding the list of memory vendors they’re working (it’s already happening – see the changelog in the latest firmware updates – they are slowly building in support for other memory models) and providing models with cheaper memory configuration (such as the recently released 3GB variant of Pi4).