Yeah I definitely think there's diminishing return in this hobby. How I explained to my friend is that for every upgrade you do you have to spend double of your existing gear.
i.e. $500 upgrade to $1000, upgrade to $2000, upgrade to $4000, upgrade to $8000...... so on so forth.
I'm too poor so I conclude $500 is good enough for me.
Which bring me to MMB2, I think it's a very terrific performance to price ratio. The market need more small single ended multibit (or R2R) dac.
I'm not sure why Schiit is the only one that makes this, is it just too much cost/time to make and not profitable enough at the $300 price point?
I really hope other companies makes more small / cheap single ended multibit / R2R dacs.
That being said I wish the combo burrito filter on the MMB2 is a bit less aggressive. I've flipped between NOS and OS mode before to check. I wish Schiit would release a half way firmware. Like combo taco filter or something with 4x oversampling. Something closer to MMB1 sound.
If this happens maybe I'll re-buy MMB2 again.