What slow servers actually cost
A 1-second delay in page load time reduces conversions by around 7%. On a server running at 80% CPU with misconfigured OPcache, every request is slower than it needs to be — and you’re paying for it in lost sales, not just poor PageSpeed scores.
Most Magento hosting issues I encounter come down to three things: default PHP-FPM settings that weren’t sized for the actual traffic, Redis used for sessions and cache on a single instance with a volatile eviction policy, and Varnish either absent or misconfigured to cache almost nothing.
What I don’t touch
I work on VPS and dedicated servers where you have root access. Shared hosting and managed platforms with locked configuration layers are outside the scope of server-level optimisation — I’ll tell you that upfront rather than waste your time.