There is also issue that SSD write is much slower than even HDD write once internal buffers are saturated, and has unpleasant consequences. When my system got

There is also issue that SSD write is much slower than even HDD write once internal buffers are saturated, and has unpleasant consequences. When my system got thrashing (droping hot pages) due to memory pressure in a limited cgroup, i see continuous 400MB/s disk read traffic (as pages are read and then dropped), but the rest of system (outside the cgroup) is usable. But when i do some big file copying, the SSD sometimes causes multi-second system freeze due to locked SSD I/O. Also, the write limits are pretty tight. Recently, i replaced my SSD after just 6 years of light use, because it reported average sector overwrite rate to be ~3300 of 3000 nominal lifetime. And current TLD and QLD SSDs have these limits even smaller.