I would suggest taking a look at synology. The 2600ac is going on 6 years old and about to get the latest feature release (1.3) with no immediate plans to eol it. And unlike Google they have a long history of LTS.
This is precisely what I did. My OnHub was having issues about 18 months ago, so I did some research. I was mostly interested in getting a browser-based interface back, push security updates from the vendor, and buying from a company that had a good track record of treating customers well and supporting their products. I picked up the Synology and have been very impressed. It got my family through the pandemic scenario of four simultaneous video conference streams with 30+ participants each with flying colors. This is my third Synology product, and I have an extremely high opinion of them. The other two products are NAS products, and both have been just as bulletproof for me.
How do you find the RF performance? For me the OnHub was vastly better than other home wifi gear I've used, but would consider more trustworthy replacements if they have comparable performance...
I guess I don’t have a ton to compare it to. Installed for the neighbors and they get signal from the office in the front of the house to the pool out back, so good? Before that they had a cambium router running DD-wrt that didn’t have anywhere near the range.
You can also buy multiple, they do mesh networking either wireless or wired. They also just announced a 6600 that supports WiFi-6e.