I personally think of a small DIY rack stuffed with commodity HDDs off Ebay with an LVM spanned across a bunch of RAID1s. I don’t want any complex architectural solutions since my homelab’s scale always equals 1. To my current understanding this has little to no obvious drawbacks. What do you think?
Btrfs used to be easier to install because it is part of the kernel while zfs required shenanigans, though I think that has changed now.
Btrfs also just works with whatever drives of mismatched sizes you throw at it and adding more later is easy. This used to be impossible with zfs pools but I think is a feature now?