Firefox a few years ago would kill my Mac battery in a couple hours, now it’s as good as safari for energy management. No reason not to use it as a daily driver now.

volkswaGENITALIA

Not even close. Started a CS degree 7 years ago at 28 and am a director of engineering now, if it’s what you wan to do go for it. I will give a warning that the market isn’t amazing right now, and people getting into it just because they see the salaries is flooding the entry level positions. If you’re motivated and excited about building software you’ll be fine, but something to be aware of.