I have a reseller hosting plan with 6 sites. I keep reading that I should have a VPS plan instead.

3 of the sites I'm treating seriously for business. Combined visitors 1,800 per day.

Generally I really like the hosting quality after a year with this host. Great uptime, speed, etc. Rarely any lag.

I'm paying $30/mo. I'm making $5k/mo.

I read that a VPS plan requires more technical knowledge and more involved work on my part. Like I'll be responsible for maintaining the server software. I don't know anything about that stuff and I don't want to waste any time learning it. I could hire someone to manage it, but only if they would do as good a job as the webhost's team and I wouldn't be paying a lot.

Anything big I'm missing out on without a VPS?