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Supercaps are usually called «enhanced/advanced power loss protection» in the datasheets. This is a feature almost exclusively present only in «server-grade» SSDs (not even all of them). For example, Intel DC S4600 has supercaps and Intel DC S3100 doesn’t.
{{Note}} This is the main difference between server and desktop SSDs. The An average user doesn’t need transactions, but the servers run DBMS’es, and DBMS’es want them really, really bad.
And… Ceph also does :) you should '''only''' buy SSDs with supercaps for Ceph clusters. Even if you consider NVMe — NVMe without capacitors is WORSE than SATA with them. Desktop NVMes do 150000+ write iops without syncs, but only 600—1000 iops with them.
