Generally speaking, the only advantage to so-called mechanical keyboards is that springs age more consistently than rubber domes. That's it. Nothing to see here. If anyone claims that mechanical switches are more ergonomic, lighter, clicky, tactile or anything, I'm calling BS on that (and I don't mean buckling spring by BS), because there's a counterexample for any of that: Cherry MY, black Alps, weird Asian vintage switches, whatever. Sure, there's a variety of possible choices, but so is with rubber domes. I've used snappy RDs, super soft nearly linear RDs, smooth RDs, etc. Mechanical keyboards are more reliable? Bullcrap, look at those Asian $35 monstrosities with MX knock-offs.
I use keyboards with all kinds of key mechanisms, including MX Red, MX Clear, various kinds of Alps, buckling spring and even plenty of rubber domes. It doesn't matter all that much. It's the whole package that makes a difference. For example, a Model M has buckling springs, right, but it's the combination of buckling springs, 2kg weight, IBM layout *and* a set of PBT dyesubs that makes it an Model M. What about, say, a typematrix? It has scissor switches! What an inferior design. Actually, it has a decent portable layout as well, which makes it unique. And so on.
One particular reason to pick Alps-/ML-/MX-compatible switches is that you can customize them for personalised experience, they're discrete (you can wire them in a custom keyboard with whatever (un)ergonomic shape you want) and they're widespread enough for a variety of aftermarket keycaps to exist (shapes, materials... and yes, colors).
My recommendation, pick a particular keyboard with distinctive features you want. Be it Filco MJ2 because of availability of fancy aftermarket parts, Model M for its specific experience, Maltron thanks to its shape, Matias Ergo Pro as the only modern staggered split mechanical keyboard with PBT keycaps (eventually), you name it. Or build your keyboard from scratch.