Yeah but if it would support plants in a fabric bottom you’ll get a much nicer root mass, it would be perfect. I have 2 I’m really thinking about cutting the plastic off 1 and trying a double layer of felt. It would be a money maker if it stands up
The roots would grow through the fabric making the concept of popping the plants out mute as the plants would be stuck to the bottom.
I just use the black plastic propagation trays. They have a hole on the bottom and it's easy to pop the starts out. They cost $1 and I've been reusing the same ones for years. Those are cool though. But after starting so many plants and not having any issue with the trays I have I'll just continue to keep using them. $10 here and there starts to add up.