Well look. Obviously there are security issues. JavaScript has its own share, PHP has an extra large share. The question has always been when the commercial businesses will decide that they need to fund the open source projects they rely on.
So, you could have programmed happily in php for 30 years, or jump on the new bandwagon every other year? compelling argument.
Or, if you spin it another way: you could’ve picked up the skills to develop for and support various frameworks, or get stuck in a rut for 30 years with just a single antiquated server-side language.
.Net has been chugging along quite nicely for decades now.
.NET is the single best thing Microsoft makes.
It’s fast, multi platform (all mine runs in Linux containers), and the developer tools are pretty good too.
I really HATE that Microsoft made it, but I love C# and .NET.