I have a Cube which will never contain UB cards, and I’m now in the process of converting all my existing decks for different formats into a “Modern Pre-Horizons” Battle Box since that was my favorite format ever.
Will probably spend some money in this, but after that I’ll never upgrade those decks again, and with more focus on UB there will be even less things I care about to put on the Cube.
This way I can keep good memories from those times, have ways to play the game with friends, and never again bother with WOTC’s bullshit.
My MTG money is now getting funneled into more Nintendo Switch games.