is angular good for long term projects? like e-comer's & forms-based app

Actually, it makes sense. It's very capable and fully-supported, it's easy to migrate and Google is investing into it, meaning it could easily survive another 10 years. Sure, React is more popular, there's that. But why not?

It definitely is, Angular is known for its emphasis on structure and conventions for long-term and big project. It is especially good to work with forms thanks to its comprehensive API that allows to focus either on the logic or the template.

For me, it's structure and one agreed-upon way of doing things. I'm ok with doing things the "angular" way because it's generally consistent and I don't have to spend time figuring out which way to do it, I can just get on with coding.

I don't think it is.