If so, how do I switch to it?
Can I use the Cinnamon desktop environment on Solus?
I am certain the answer is no.
- Best Answerset by davidjharder
When it comes to full DEs there are only Budgie, GNOME, KDE Plasma and MATE (soon to be replaced by xfce) available for Solus.
(apart from that there are a number of additional window managers and the like, but those need extra configuration, with the possible exception of i3 which comes somewhat pre-configured)
I suspect you could emulate it through the use of Gnome extensions.