You could still be served a court order to hand over the footage, it is just a couple of steps harder than the one stop shop that is Ring / Amazon.
Annecdata - but people I know who have cctv around their home store for as long as possible, limited only by the storage size availiable - every motion from a car / person / tree blowing through the trees - years of recordings.
People are selecting 180 days on Ring as the retention period (if they could select longer they probably would), the default is 60 days.
What realistic use case am I missing that would require 60 days let alone, 180?
Or without even going on vacation I had an expensive DLSR camera stolen and didn’t realize it for 2 months when I went to take it out of its case. Assuming I had a security camera in that room 180 days would have been useful.