The functions available have moved about all the time with subscription. Most recently 14 functions that had previously been paid for were released to Free users https://evernote.com/blog/14-features-for-all
Note history and restore (Formerly Personal)
Offline notes and notebooks (Formerly Personal)
PDF and image annotation (Formerly Personal)
PDF export (Formerly Professional)
Business card scanning (Formerly Professional)
Spreadsheet preview (Formerly Professional)
Boolean search (Formerly Professional)
Geographic search (Formerly Professional)
Document & image search (Formerly Professional)
Email notes to Evernote (Formerly Personal)
Share notes via email (Formerly Personal)
Custom global keyboard shortcuts (Formerly Personal)
Customize the “create” button on Mobile (Formerly Personal)
Custom templates (Formerly Personal)
So, yes, features move between plans but many of those cited previously were only ever part of a paid plan and some are now part of Free already.