[SpaceMartini]

Solving storage at the tens of TB scale with commodity hardware is fine to a point (I have a ZFS NAS at home) but has much more ongoing maintenance burden than S3 and you need at least 2 copies for it to be a remotely comparable solution in terms of durability.

Ultimately you just have to design for what is important to you; I don't want to spend time managing this stuff any more, so keep a local NAS for my partner to access and put the bulk of my "cold" data into 2 different cloud object storage providers. Note that neither of these is actually S3; for business use I would absolutely use AWS but for personal files I can manage with the reduced capabilities and lower prices others offer.