WiFi is pooched. Usable on 2.4 as a guest/iot network. Use an AP for anything else. There are ongoing attempts to improve it atm.
Other than that, these are still a capable series of boxes running on a wire. Dual partitions are also a real bonus. For all intents, pretty well brick proof.
There is also a Community Build here: Divested-WRT: No-nonsense hardened builds for Linksys WRT series