I have a decent bit of vinyl, but it’s all several years old and in in genres I don’t spin anymore.
And I’m one of the dickweeds who generally thinks digital audio sounds better.
I like the visual nature of flipping through record sleeves, but the sound and capabilities of computers are worth more to me.
If you’re not fussed about playing records and don’t think you will be buying vinyl sell them and use the money to buy music. It sounds like you are enjoying the mixer without the 12’s, at least you gave it a go to see if you would enjoy it. We can give you an opinion but I think most are influenced by what we would like for ourselves, you have been playing long enough to know what gear you want to use.