I'm glad we're not in a situation like the 76'ers. Embiid can be signed to an extension this summer and apparently they're making it a priority to sign him to one. He could make anywhere from $100 million for 4 years to $130 for 5 years. That's a ton of money to shell out for someone that's only played in 31 games over the last 3 seasons. If he signs a max deal that could effect the market value of all rookies looking for extensions. I wouldn't be surprised if he got a max deal but how many team options can be placed in a contract and how soon could they put a team option in? He could kill their cap space for years to come if he gets hurt again.
There are a few players who have missed their rookie season because of injury in the past but I can't recall a player missing multiple seasons because of injuries. Teams should be protected somehow, maybe changing the way rookie contracts work so if a player misses an entire season due to injury before they ever play in the NBA then the team is able to extend their rookie contract an extra season. That would make it so they can't become restricted free agents until they've played in 4 seasons rather than it just being 4 seasons from when they were drafted.
https://clutchpoints.com/76ers-focused-on-signing-joel-embiid-to-extension-this-summer/