I love my Evolver for what it is; a very versatile monosynth that isn't a Moog clone. It's one of the more original synths I own. Mine is from the first batch released and I recently upgraded to the 3.x firmware chip. 14yrs later and I'm still finding new ways to make the thing shine. Of course there are ways that DSI have done things that I wish were more like Waldorf, but hey, can't have it all.
Juxtaposing the Evolver with my Tetra, they are two very different beast. Even as a mono, the Tetra is incredible traditional. Not a bad thing really, as it gives me that wonderful classic analogue polysynth sound, bringing a John Carpenter flavour into my mix, something I could never quite reach with the digital synths I own. It takes a little work to get an experimental type patch from it similar to what I can do with the Evolver, but at the same time refreshing to simply dial-up a preset and tweak a few envelope settings to suit what I want.
Another Evolver-like synth would certainly find a home in my studio, but something more on the additive side of things. Another mono wavetable, but with multiple tables and more like the Microwave/Micromonsta tables with one analogue osc. And perhaps a few FM ops. The revival of the analogue synth is great, but all the manufacturers are making trad subtractive synths with few tweaks from that. Give me a wavetable synth with multimode analogue filters!