I wouldn't want to use it as it's original size but I wouldn't hesitate to cut the glass down and make smaller rimless tanks. My understanding from watching videos is that those rims are super hard to remove when intact. I can't imagine them being broken helps. Plus I wouldn't want to trust tank integrity to however well the super glue holds.
I can't really do rimless open top because of my cat, but cutting it down to a shorter size might be an option. Would it be worth it to get a tempered pane at a glass shop to cut the height in half and make two 48x12x10 tanks? I've always thought it would be cool to do a whitewater stream with hillstream loaches or something similar.
What's the best lid option for a rimless tank? I've only ever seen rimless tanks with lids in much smaller sizes.