Can I opt out quickly so I can see how the difficult things work?
Will I get this flow every time I change computers, delete cookies, etc?
How much will it bloat the experience once I'm an expert? These things always have telemetry ... will it still be collecting telemetry forever?
As someone who buys line-of-business software, I know these concerns are rarely considered by the SaaS developer, but they are important.
Unrelated : Why does every product page do the fading in thing? When I return to your site to see things I scroll down to a bunch of blank stuff waiting for your animations to catch up. Is this how you prefer the rest of the web?