I have a spare Nano R4S with OpenWRT installed and wanted to hand it down to my partner to hang infront of their modem. All I really need is something-something WiFi that's "future" proof.
does not have dumb management apps if possible (neither does any cloud or remote access matter)
possibly not PoE (it's a home network, there are no PoE devices in use currently)
optionally has a pass-through LAN port, if the home PC ever decides to go wired (but again, entirely optional)
OpenWRT on the AP is optional, it just needs to be configurable, wifi congestion and signal strength is not high on the list, the place is small-ish, the AP is in the center of all rooms.
I think that fits the bill very well. Extremely cheap, if there's a necessity of LAN deployment, I'll throw an unmanaged switch into the mix eventually.
4A Gigabit is a very good device indeed for the price with 2 notes:
Wave1 WiFi 5 (this is not really fitting the "future" proof requirement but serving OPs desired devices would be without issues especially on 250Mbps)
16 MB internal memory - might be a limiting factor in the future for openwrt if you plan on adding additional programs (without programs it is no trouble).
Still, if OP decides to try it out, lt me share that the router is really good for that money (should be available for under 30 euros). Good signal, compact, elegant, enough eth ports plus it runs in harsher environment without a trouble (in a climate where is 30*C+ for a few months and humid, works fine). SQM is possible.
Factory firmware is really easy to use and navigate too!
Another one available in EU would be Xiaomi AX3200 which is considerably more powerful than 4A but also close to 60 euros (i have checked on amazon.de, unsure if that helps).