If it helps, I upgraded, graphic card + mem. and monitor. No reactivation was asked for, but as to just how far you can go, without re-activation, I don't know.
But it is a simple matter, carried out over the internet, or phone. J.
OnePlus 5T review: Hands-on
Illustrator Andrés Lozano on his improv line work, brazen use of colours & hand sketching
iPhone X review
Comment envoyer gratuitement des gros fichiers ?