I do.
To be fair there are actually some reasonable arguments for vellum. This website sets them out quite well:
http://www.patricialovett.com/vellum-and-acts-of-parliament/
(although she argues that vellum is green because it uses veal calf skins that would otherwise go to waste - as I understand it Parliament actually uses goat or sheepskins. The general point still applies - no cuddly animals are harmed specifically to get their skin to make parchment, cuddly animals killed for other reasons have their skins turned into parchment).
BTW, just in case you weren’t aware - they are still going to be on vellum so the Moggster can rest easy.
Personally, I’ve always thought that if the government is genuinely worried about the cost of printing all the laws, they should enact legislation so that the costs of printing come out of the MP’s allowances.
See how many Acts Parliament passes then.