15 year mortgages were even lower (2.38% APR at the time) but I didn't want to gamble too much with COVID uncertainties (for all we know this pandemic could ride on 2-5 years).
If you're fairly financially solid and looking at real-estate, it's not a terrible time. My agent also offered a COVID plan free which declares my agent's agency will re-list and resell the property for me at no cost should I desire within one year (obviously, I'd lose any difference in value should the the market value decline, but if things get truly nasty, I can likely bounce out before the market adapts given how quick sell turnover rates are here). No closing costs would be charged under this case (obviously any require renovations would be my liability).
I should add that my mortage will be less than what I'm currently paying in rent... and in pretty solid tech hub that isn't SF.
It makes sense to buy if you plan to stay in an area long term. But, I would be wary buying if you expect to move geographically or outgrow a home within a 5-10 year horizon. If you stay local, your next home will likely rise and fall with your current home.
Overall, with a lot of research and searching, I found a good buy under a very special set of circumstances (at least I hope--there could be hidden issues but I've been very thorough). Some other homes have inflated to ridiculous price points around the area (as if they weren't already incredibly high).
It's always a balance looking at interest rates and price, so you have to be careful. Also, there's nothing saying the pandemic won't completely gut the economy and housing market in this area for years to come or even indefinitely. It's possible rates could drop lower. I'm currently betting that in the long 30 year run, it won't, for a variety of other situational reasons. YMMV.