It's been quite a long time since the first cryptocurrency with the "Mimblewimble" privacy technique was released. My first days of using GRIN were quite troublesome due to its added complexity. But it's a great coin to use for privacy-oriented transactions once you get the hang of it. Somehow, GRIN became a forgotten cryptocurrency as all of the attention shifted back to Monero. Was this a result of poor marketing/promotion efforts? Or a lack of user experience?
I'm wondering if this coin still has a future, especially when privacy on crypto has been frowned upon by mainstream governments. Do you think it can be good long-term investment like Monero? Or is it a complete bust? Your input would be greatly appreciated. Thank you very much.

And if my memory serves me right, it was also at least promoted by our admin here as it was accepted for forum payments. However, it was stop in 2021 and up to now, it's no longer being accepted.
Perhaps with this news, it's no longer a thing, although if you look at the Github repo:
https://github.com/mimblewimble/grinThere is still some movement months ago and it is still being developed, but there's need a lot left to be done here.