Honestly any company that uses AI as part of their business model should be running open-weight models locally. They can be fine-tuned to their specific use case, it's not as compute-intensive as the initial pre-training.
And overall it'll save the business money because they don't have to shell out for these flagship APIs that are only going to crank up their rates as they become more desperate to prove to investors that they can turn a profit.
Individuals who use it should be running something between 7 to 24 billion parameters depending on how many resources they can allot to it. And even if you don't use it, it can't hurt to keep local copies of a few.