Decentralization of full node software is good for #Bitcoin. The rise of Knots is healthy game theoretical behavior. Would be great to see yet more implementations that are within consensus gain traction.
Discussion
How was the data collected?
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).