I'm over 30, and been working in the industry for ~6 years now, and I say don't worry. Yeah, there's segments of the software world that push out new frameworks and languages at a breakneck pace that nobody could keep up with. There's no reason why you need to know them to work, though. The vast majority of developers out there are working in time-tested languages and frameworks. C++, C#, and Java for most of the enterprise and big business world. Most of the web work that uses any other language is Perl and PHP. There are jobs out there in the latest cool stuff, but they're a small fraction of the overall market. I haven't really worked with that side of the industry, but I'd have to guess that any company there knows that they aren't going to find many people on the market that already know their stack, and so will be open to teaching you.
Don't worry about trying to keep up with the latest stuff. Do pick a language and framework, and go build something in it. Make it do something useful and solve somebody's problems. A proven ability to execute on a business idea is worth far, far more than knowing the latest languages and frameworks off the top of your head.
Don't worry about trying to keep up with the latest stuff. Do pick a language and framework, and go build something in it. Make it do something useful and solve somebody's problems. A proven ability to execute on a business idea is worth far, far more than knowing the latest languages and frameworks off the top of your head.