Reply by Loren

You could do it – but I would be wary of doing so if using
a floating door panel. Glue the panel (only if using ply
or similar for the panel) in and then the door is effectively
a slab door with some detailing.

Baltic birch in 3/4” is not as torsionally stiff as most solid
woods, so if you’re going to do this I’d recommend getting
1” thick ply for the door frames.