The wrt3200acm is basically well supported and a very fast wired router. The wireless side of it however is less good, mwlwifi has always had interoperability issues (especially with IoT/ smarthome devices run by the esp8266/ esp32), has quite a few problems with DFS channels and it's completely broken for WPA3/ IEEE 802.11w. After Marvell has sold their wireless division to NXP there is little to no chance for any fixes for its firmware/ driver anymore.
Because of these challenges on the wireless side, I would not recommend to purchase it anymore - which is sad, as the device is fast, can route at 1 GBit/s line-speed and is very well supported. For the wireless devices it works with, it's also very fast - but it (most likely) won't get any fixes for the many known issues anymore.