Meh.Threads such as these are always encouraging to stay committed to what I have. Sometimes GAS is so great that we seek something different just for the sake of it. I'm not saying that's what OP did by any means, but rather that when people come back to M43, it reinforces the notion for me to not always look for different grass--I should be out photographing it instead!
I bought an older Sony APSC, two Minolta film cameras, some flashes, a bunch of lenses, cases, etc. etc. I have well under $500 in it all and I'm having a blast with my 'new' stuff. Nothing like getting that roll of film back from the lab. You don't have to stick and stay, nor do you have to spend tens of thousands. I'm on the hunt for a good Brownie like the one in my avatar, can't wait to put some film through one. I'll bet it costs me about $25 and will be as much fun as a new pro grade lens.
In the OP's case he does it for a living and made decisions based on what he thought was best at the time. He has come to a realization. Ultimately, it has little to do with we casual shooters. Remember our discussion of the term 'invested'. He is invested in every sense of the word.