Why would working on an M1 mini be „true hell“ to you? Is the M1 Pro/Max really that much faster for your use case or do you have other reasons? After all the M1 mini is not actually a slow machine by any means.
Reason why I’m asking is that I’m in a similar position: I can bring the UHD-630 in the 2018 mini to a screeching halt by simply handling 3d objects. Thus I am wondering whether I should switch to an M1 asap or rather hold out for an M1 Pro/Max mini for performance, Ram and ports improvements.
As you might have guessed by my avatar, I mostly work in After Effects, and as much as I don't work on hollywood films, I still have to deal with complex timelines and continuous rasterization of vector assets.
I can tell you that the M1 Max, while not miraculous, it makes everything so muchs snappier, especially GPU wise.
Also having 64GB of ram is heaven if compared to 16.
Naturally After Effects, while actually having a usable beta, still needs to be fully optimized for apple silicon.
Ideally I'd get a "low tier" apple silicon mac pro or an imac, but I'm sure an M1 Max imac would cost more than my macbook, not to mention a version with 2 of those chips...
Considering the machines wil realistically be delivered in early may, "losing" 5 months of work isn't an easy decision to make.
The macbook, while not being a very laptop person myself, is an M1 Max I could use now instead of living in the promise of a new machine in mid 2022.
I'd also be able to get an external display with the extra money I'd save in these 5 months.
With regards to your situation, it depends if you can afford to wait the time (assuming the new minis will be available this spring). Also I don't think the high end minis will have anything beyond the M1 Max, therefore I'm not sure you'll find 128GB of Ram in the Minis.
Personally 64GB is the sweet spot for my workflow.
Considering how gaming is my second passion (after my job) I'm thinking of returning my mbpro and get a 2.5k $ gaming machine I'd play and work on for the next 4 months, as I'd still have half the money saved (I paid 5K for my macbook) and I could make the difference back with my job.
I strongly prefer macOS but I grew up with Windows, therefore I can still use it, although I really don't enjoy it.