I started a thread on this over in the road forum but FYI - tube prices have doubled at some distributors overnight. They also hinted that they will double again in a month or two. There are discussions of a rubber shortage and most of these facilities are in Malaysia where covid has their government shutting down factories. Shimano has been shut down there for a month so far.
Just FYI. Should impact all tires and tubes to an extent and at some point. When and by how much is up in the air. If you're particularly sweet on particular tires and tubes, etc then maybe stock up.
Tubeless will suck though as there is a shelf life to sealant and they almost all have latex in them.