An alternative answer with more details or corrections is welcome (as always).
What opcodes are supported in Liquid but not (yet perhaps) on Bitcoin?
Burak answered this on Telegram. Here is a list of those opcodes:
OP_CHECKSIGFROMSTACK, OP_CAT, OP_SUBSTR, OP_DETERMINISTICRANDOM, OP_LSHIFT, OP_RSHIFT
With OP_CAT and OP_CHECKSIGFROMSTACK you can make ...
I'm not aware of any sites that track all the information you're looking for already, and I know next to nothing about RSK.
Transaction data in the Lightning Network is private by design, so while some node operators could publish their own node's payment stats, there cannot ever be a global measurement. As Michael mentioned, every Lightning node ...
1ml.com has some statistics on the Lightning Network. That includes one statistic on new channels which each require an onchain transaction. It also has a page on closed channels which also require an onchain transaction.
I am curious about this because if a sidechain like Liquid doesn't really contribute to some Bitcoin transactions, fees and has different ...