I come back to comment on this thread, a bit more carefully this time. You cannot ignore the power consumption of those machines. As
chrfr pointed out, they are very ineffective on that. Mine consumes roughly the same power at idle as my Mini M1 does in full run. Even in sleep mode, 5,1 "eats" more than 8 watts, compared to 0.7 of Mini.
My 5,1 is a two-Xeon, at 3.33 GHz each, and 64 GB RAM ECC; I open a lot of apps simultaneously and I forget about it. OK, but the 5,1's speed is not noticeably better than the M1's. Sometimes the MP is slower, which worsens as a result of having USB 3.0 at best, not USB-C or Thunderbolt, as ports.
And one point newcomers underestimate is that some expertise in machine upgrading and OS updating is absolutely essential. Read the previous posts by others about that!
All in all, such MPs being cheap, you can find one and enjoy it for quite some time, but they are not a panacea computer-wise. Oh, did I mention they weigh nearly 20 kilos?