This isn't an agreement with the parents comment about Tesla but re-usable rockets weren't invented by SpaceX. The idea existed for a while and various projects got to different stages. Including a functional 'McDonnell_Douglas_DC-X'.

The project got taken over by NASA and the budget cut before being axed. You really do sound a bit too fanatical and should probably question more instead of accepting companies as entirely revolutionary.

To be clear, the DC-X was not capable of reaching orbital velocity.

"The idea existed for awhile"

Yep, SpaceX has barely innovated at all. Their contributions to space flight are not really of note.