Players who only have access to the 2014 Player’s Handbook will maintain their character options, spells, and magical items in their character sheets. Players with access to the 2024 and 2014 digital Player’s Handbooks can select from both sources when creating new characters.
I only bought books through the website to avoid the apple tax. I’ll look for more information to see if the newer books will “entertain” me, given that I don’t have time to play anymore.