> I haven't found a community of folks who are building products, ideas, sharing thoughts, talking tech, talking lessons learned about growing their company, virtually collaborating on problems by sharing ideas, etc.

Twitter can be exactly this, but you have to put in some work to curate your follow list. You also have to be quick to unfollow anyone who turns out to be spammy or picking fights all of the time. If you just let your follow list grow unbounded, the quality of Twitter goes way down. If you follow and unfollow all the time, you can get a fairly interesting Twitter feed full of people sharing projects and discussing ideas.