Hi guys...just joined this forum only to add to this thread. Wish I had found it before.
I too have gotten caught in this mess. I bought a pulse rifle from Matt years ago. It was late, but I did get it eventually and it is a masterpiece. In November of 2021 I approached him about a Smartgun commission, which he immediately agreed to, took the money for, and quoted me a 3 month turnaround time. Needless to say, I'm still waiting. I have endless emails with excuses and promises that now, because of this thread, are all too familiar. Then he stopped responding to emails. Reached out to him on various instant messengers and eventually he started ignoring me there too.
What's different from what I've seen on this thread is that I got a hold of his phone number. I called it and he answered. I talked to him for about half an hour about what in the world is going on. All of the same excuses (job, family health issues, etc). He said he basically never turns the data on on his phone any more or checks his email because he is barraged with hate messages. I told him that people are justifiably angry not just because of the money loss but the lack of any response from him. He agreed and said this has become such a horrible experience for him that he's getting out of the hobby/business. Take that as you will. The conversation was very civil overall.
Before we ended the conversation though he assured me that he'd save my number and keep me up to date. I got about 3 more text messages out of him before every subsequent message is listed as undeliverable and all calls go direct to voice mail.
Anyway, that's my experience and my two cents.
It really is sad. He's got the tools and he's got the talent, but he just let it all slip away. 
