Once Elon showed how to do it, and how cost-efficient it was, a rocket company that doesn't do it is not viable.
Spacex first landed an orbital booster just over 10 years ago and have now landed 600 times.
The entire rest of the world combined has done it twice.
For a long time people would scoff when it was said they had a 10 year lead, and that others would catch up quickly. Proof meets pudding.
It's the 4-minute mile except it's taking everyone else too long to copy it. Really shows how far ahead Musk is.