Clark’s site is great but you can always check https://coin.dance/nodes#nodeVersions

Switched to Knots soon after I started running a Node and locked down the system to focus on monetary transactions. I personally do not mind a small amount of non-monetary data as it may be useful to one or more people in the future - but I do disagree with Bitcoin Core on their present direction.

Also why I will not buy a Futurebit (lottery) miner as it seems to run Core and it is not clear if this can be changed.

Bear in mind, until Bitcoin Core 30 comes out almost 100% of Nodes have a small OP_RETURN size (83bytes), Knots nodes may be running an even tighter implementation with respect to inscriptions, OP_RETURN size (IMHO).