The new M1 SOCs max out at 16GB RAM, which seems like a major limitation, but the timing and latency of this integrated RAM is probably much better than what you could otherwise achieve. Meanwhile, improved SSD performance will probably have a larger impact on the whole system. I remember when I bought a 15k RPM hard drive ca. 2005 - it was like a new computer. Upgrading the slowest part of the storage hierarchy made the largest difference.
One slight disappointment in the Mac mini is the removal of two USB C / Thunderbolt ports and no option for 10G ethernet vs. the Intel model. An odd set of limitations in 2020.
Overall, at the price they're offering the Mac mini (haven't really considered the other models for myself), I think it's ok to take the plunge.
- Sent from my Dell hackintosh