Could work. I don’t know how your specific SSD handles partitions. Some SSDs don’t care about partitions on the physical level at all. In that case using a partition or unpartitioned space to reserve space to stay empty would work.
Some SSDs might actually physically reserve space for a partition, in that case leaving something unpartitioned or as an empty partition wouldn’t help.
I think most SSDs should ignore the partitions on the physical level, so it should work, but no guarantees.
What about something like LVM cache? Would it be worth setting up an X% empty partition on the drive, just for empty space reasons?
Could work. I don’t know how your specific SSD handles partitions. Some SSDs don’t care about partitions on the physical level at all. In that case using a partition or unpartitioned space to reserve space to stay empty would work.
Some SSDs might actually physically reserve space for a partition, in that case leaving something unpartitioned or as an empty partition wouldn’t help.
I think most SSDs should ignore the partitions on the physical level, so it should work, but no guarantees.