Yes, but if 99% of the nodes drop them, they wonβt be reliably propagated.
A block can hold 3000 to 4000 txn now, if you make it to 100k OP_Return the default settings, then a block with max 100k OP_Return can only hold 40 txn.
You would increase the blockchain bloat and make it more expensive for everyone.
Why is that good for anyone?
What is a good use case for 100k OP_Return that you canβt do with a hash and storing the data somewhere else?