Someone else started this yesterday, but it's already rolling the ball, preposal to bring classic car road tax to 30 years instead of 40.
https://petition.parliament.uk/petitions/578294
I think it's a great idea, especially with so many cars being traded in for electric cars etc it could really help booster car values of older stuff and also revitalise the classic car market after the global lock down.
I've no problems with mot's being 40 years myself however, but free road tax after 30 years would definitely go a long way imo.