What platform do you think is the best to build a community with?

Howdy!
I'm in the early stages of launching a product and one thing I want to focus on is building a strong, engaged community around it. There are so many platforms out there, but I'm curious to hear from those of you who have already gone through this journey.

In your experience:

• Which platform has been the easiest to build and grow a community on?
• What made it work so well for your audience (e.g., ease of use, engagement tools, discoverability)?
• Did you face any major challenges on certain platforms that made you switch to another one?
• Any tips or lessons learned from managing your own communities?

Right now, I'm weighing between Twitter/X, TikTok YouTube, Facebook Groups, and niche platforms like Circle, but I'm open to exploring other options. Would love to hear your thoughts!

Thanks in advance for any advice you can share!