Wearing clip-ins counts as protective styling. If all your ends are tucked away, your real curls are safe from the stress styling and moisture is locked in at the roots. This promotes hair growth, so eventually you might have strands as long as the wefts you're rocking.
You can try new styles. I spotted this half-bun look on Instagram and desperately wanted to try it out, but my natural hair wasn't long enough. With the added inches, I was able to pull everything up into a topknot.
You can finally go to the gym. I've avoided working out for years because my curls are never the same after sweating. You can remove the clip-ins before Zumba class without worrying about shrinkage.