Does changing boot disk to SSD affects performance?

We recently changed our production database disk to SSD. To clarify, all data paths, caching, tmp, ... directory references in the MySQL configuration point to that database disk, now SSD. The boot disk is still a regular HDD (in GC terms: Standard Persistent Disk). Will the change to a SSD boot disk affect overall performance of our database system? The system is high read, low write; mostly analytics.