If you are curious whether Ubiquiti ditched the fan on the new U7 Pro Max, well, I have some bad news for you. I opened the device and this is the teardown video.
I'd say it's best to only buy routing devices supporting openwrt. Some Ubiquity devices seem compatible, so maybe you are in luck. In my opinion it's just best to stay away from preinstalled commercial software and just install Linux. You get away from the whole process of enshitification, gain long term support and an incredible set of features commercial software will never provide (at a reasonable price) imho.
Ubiquiti U7 Pro Max WiFi 7 Access Point Teardown: To fan or not to fan ( youtu.be )
If you are curious whether Ubiquiti ditched the fan on the new U7 Pro Max, well, I have some bad news for you. I opened the device and this is the teardown video.