I pay for hosting and Wordpress, is super cheap, I wrote soem blog posts in 2-13 then got bored, the site is still up and is up to date, with no effort from me, no code or sysadmining about. If I need I can start blogging again tomorrow from a browser or I could get a fancy app but if you used some non-standard thing you need to keep admining it, and if you maybe stopped like me for 8 years when you get back you probably forgot all the details about what stuff you used.
If for some reason all those companies selling and supporting Wordpress would not be allowed to continue using it by magic I am sure they are capable enough to migrate it for me.
My only experience with Wordpress is with a simple blog and not complex sales pages or other stuff that require using SEO/sales/magic plugins. Worst case scenario if you are a developer you can dump the wordpress database into a file then write a script and generate plain html files or migrate to some other format.