Andy from Backblaze here: The capacity of the boot drives ranges from 80 to 500gb typically. They are mostly hard drives with some SSDs added recently. We are switching over to SSDs for boot drives. The workload is reasonable, but on the higher side as they not only boot the systems, they also are used to store log files temporarily - so lots of reads, writes, and deletes. Since we only have a little over 2,000, any data we published not be very accurate. If you are really interested, the boot drive data is in the data files we publish each quarter.
