It's not so clear cut. You need to benchmark before and after.
Often acceleration modules on Broadcom, Qualcomm, Mediatek etc are proprietary and without acceleration in OpenWrt/Lede the router is going to be dog slow.
The wifi modules are also proprietary and need be well supported by Openwrt/Lede or you will see throughput drops.
Of late it's just best to use what's in the router and not bother. And we move to faster connections on consumer routers with slow main SOCs the proprietary accelerators will become even more important.
You're right. I always consult LEDE's supported hardware wiki first before making a purchase decision. It's not user friendly at all and since EU's Radio Equipment Directive [1], things haven't become easier.
Often acceleration modules on Broadcom, Qualcomm, Mediatek etc are proprietary and without acceleration in OpenWrt/Lede the router is going to be dog slow.
The wifi modules are also proprietary and need be well supported by Openwrt/Lede or you will see throughput drops.
Of late it's just best to use what's in the router and not bother. And we move to faster connections on consumer routers with slow main SOCs the proprietary accelerators will become even more important.