Old Wireless routers

I have a larger property with good cat 5e cable connectivity tied back to an 24-way unmanaged switch and a Raspberry Pi 5 running OpenWRT which acts as my router. For wireless coverage I use regular retail wireless routers I which I put into AP mode and turn off the DHCP server. From time to time I upgrade my wireless router, I take the old one and locate it somewhere else and use it to give coverage to a different area. Is there anything wrong with this?