Personally, I find it better to have multiple low end access points (like the TP-Link Archer C80 which has 3x3 MIMO on 5 GHz) deployed to achieve excellent coverage in a house. Sadly, the U7 line is a bit too expensive for that. Plus, I'm loathe to deal with UniFi deployments now that I am well versed in the glass jaws in the platform.
There really is space in the market for a product line that is basically what UniFi is, but done "right". Ie: can be debugged or you can fix it without an internet connection or recover the system when the owner forgets the password and lost access to the email account used for 2FA. UniFi is an absolute nightmare the moment anything goes even slightly wrong.
You can find older generations on eBay very inexpensively for what they are, install Ruckus Unleashed firmware on them, and operate them completely locally.
They have the best beamforming antennas in the industry and their firmware is rock solid. I'm on some very old models (2.4ghz and 5ghz only) but they work fantastically well. I'll probably upgrade to some wifi 6 models soon.
But for my uses 500-600mbps rock solid throughout my house is plenty. Anything where I want max throughput/low latency/low jitter (mainly gaming) is hardwired. For wifi I care much more about complete and consistent coverage.