Quantum dynamics on your laptop? New technique moves us closer

Reading their paper, it does seem like this method is significantly simpler than using something like MPS, my main concern is the practical coupling regime for which this method works, I would imagine that it would fail closer to critical points in theories with phase transitions?

I'm curious, are any quantum simulators accessible to sort of hobbyists?

I have a background in solid state physics from coursework, but I've never really used QM for almost anything outside of school.

Try ORCA and GROMACS. Accessible as you can DL them and there are lots of docs. But very high learning curve, and not graphical on their own.