Bucher has a good article up on why playing overseas isn't a totally viable option.
https://insider.espn.go.com/nba/story/_/id/6764023/nba-ric-bucher-perils-going-europe
Because for many people this will be a tl;dr here's the capsule summary of the key points:
1. Injuries overseas will allow teams to void guaranteed NBA contracts (so if Williams blows out his ACL, the Nets can cancel the remaining $33 million on his deal in the US), making it a risky proposition for NBA players.
2. European league contracts are non-guaranteed.
3. Teams will simply choose not to pay players who they feel are underperforming or because the team is playing badly. Many players have had to walk away because they couldn't navigate the court system to collect payment.
4. Star players are given less leeway in Europe in favor of coaches.
5. Travel and training conditions are poor, which heightens the risk of injury.
https://insider.espn.go.com/nba/story/_/id/6764023/nba-ric-bucher-perils-going-europe
Because for many people this will be a tl;dr here's the capsule summary of the key points:
1. Injuries overseas will allow teams to void guaranteed NBA contracts (so if Williams blows out his ACL, the Nets can cancel the remaining $33 million on his deal in the US), making it a risky proposition for NBA players.
2. European league contracts are non-guaranteed.
3. Teams will simply choose not to pay players who they feel are underperforming or because the team is playing badly. Many players have had to walk away because they couldn't navigate the court system to collect payment.
4. Star players are given less leeway in Europe in favor of coaches.
5. Travel and training conditions are poor, which heightens the risk of injury.