If something does come out that fits more in my sweet spot at WWDC, then I end up "stuck" with a machine that is a little overpowered for my needs. Not the worst problem ever. Better than waiting forever for the perfect Mac.
The Mac Studio is an amazing machine, at least from what I have heard. It's the closest thing to the mythical "xMac" that Apple desktop users have wanted for the past two decades. I'm looking forward to hearing your thoughts on it, once you give it a test drive; please keep us updated. Even if Apple releases an M2 Mac mini, it won't be as powerful as the Mac Studio, and the M2 Pro/Max variant for high-end machines is probably some time off. Right now, Apple can't even fill orders for the current Mac Studios and MacBook Pros. The M2 will likely have some gains in single-core performance, as well as overall efficiency, but I suspect it won't be revolutionary over what the M1 offers.
I'm personally waiting until the M3 series are on the market. We are
now starting to see software that is
specifically designed for Apple Silicon, and won't work with x86 Macs. Sure, right now those titles apply to games, but according to
the Steam survey from April, 39% of Mac gamers are already on Apple Silicon. (I'm not using Steam to represent the overall market, just the trend.) This is happening quicker than I had anticipated.
Whenever I do make the jump, I'll either be looking at the base Mac Studio, or an M(X) Pro version of the Mac mini, so I understand the internal debate that you are going through. There's nothing wrong with having a little too much power, and there's still no guarantee that the Mac mini will ever get a Pro chip. My philosophy has always been to purchase the best you can reasonably afford, enjoy it for as long as possible, and only upgrade when absolutely necessary. I'm still using a base model 2018 Intel Mac mini, and wish I had gotten the more advanced model, so right now I'm holding my Mac together with sticks and bubble gum. I had planned to use it for only two years, but now I'm going try to get at least five or more out of it.
So, I'm envious of your Mac Studio purchase and having a computer with a little extra headroom doesn't hurt, and it will almost certainly best the standard M2 in most tasks.