I don't know about SpaceX (since they're private), but anyone who can read a quarterly report knows that TSLA is one downturn away from becoming insolvent. Their last bond issuance was well into junk territory, and the cash burn means they'll be forced to raise more money sometime this year. If cash becomes harder to come by they're in real trouble.
It doesn't help that they seem incapable of ramping up Model 3 production.