It is very difficult to get the driver included in the upstream. This is why almost none of the Chinese equipment manufacturers do this. And those that do do it for one or two models out of 2-3 dozen produced, and this process rarely takes less than 2-3 years. That is, by the time the device is included in the kernel, it is usually already out of production for a year or more.
So don't repeat these legends from 20 years ago. However, this may not have been true even 20 years ago.
On some of my zfs servers, the number of snapshots (mostly periodic, rotated — hour, day, month, updates, data maintenance work) is 10-12 thousand.
LVM can't do that.
So don't repeat these legends from 20 years ago. However, this may not have been true even 20 years ago.