Everyone gets to do whatever they want. But there are some things to consider.
IMHO... a Pro should shoot the best original he/she can afford to shoot. It never hurts.
Shooting RAW is infinitely better than shooting an RGB codec. For a million reasons.
Upgrading a camera is cheaper than buying new cameras... over and over.
Having the ability to use many lens options/brands is better than being stuck with one.
Shooting a small camera is easier than shooting a big one... for a variety of reasons.
Free software and firmware upgrades that add features... is good.
Over-sampling is better than up-rezzing.
A company that listens seems better than a company that dictates.
Companies that actually deliver the future are better than those that pretend the past "is good enough".
Pretty easy stuff...