Edit: My original reply below is wrong as it overlooks that fully automatics have built-in grinders. Sorry. Perhaps a Jura GIGA 6, which has two hoppers, if switching between regular and decaf every day?
https://au.jura.com/en/homeproducts/...=GIGA6-elheute
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Original reply [only for semi-automatics]: Whatever machine you get, you can switch between regular and decaf beans if you just weigh out what you need each time (for me, 18 grams), and just grind that. Instead of keeping them in the grinder’s hopper. The tricky thing is adjusting the grinder to how coarse or fine you need to make it, so your shot pours well. You can mark on some tape where the desired settings are. Another idea: freshly grind the regular beans but pre-grind your decaf.