I believe back in the day CDN could also help with libs due to maximum number of connection to same domain; but with http2 this issue went away.
Still, localized content delivery is still needed even today, so CDN usage is still preferred. Unless your provider actually does CDN already, like github pages or something in those lines.
Fun thing is that people will decide if it's "over" or not. Not corporations.
If most of employees hands in resignation notes; then the policy will be reverted as quickly as it was created. Unless whole management is toxic and they cannot survive without having ability to micro-manage and shoulder-peek all day long.
I'd say you can forget half marathons for this year, as normally you can increase your running distance by 1km per week. So if you can't do 5 today, you won't be able to do 20 until 15 weeks later.
Just start small and keep it consistent no matter what - like running 1-2km per day NO MATTER WHAT (rain, snow, cold, w/e). Just do it.