The bigger problem is that the web itself is rotting away as we speak. Yes, browsers no longer supporting old API calls is a huge problem, for instance for archived content that at some point will simply stop working, a bit like a 78 RPM record. Good luck finding a player. All the Flash content and so much other work that is part of our digital record is no longer working (and I absolutely loathe Flash).
So whether or not you can still use it today, the bigger question is will you be able to use that website 10 years or longer into the future? Because any book ever printed can still be read today (assuming you know the script and the language it was written in), I think the longevity of the web will top out at a couple of decades at best before the digital termites and worms will consume the devices that could have rendered the content you are interested in.
Plain ascii text will likely live the longest, with markdown as a good second. Anything that executes will likely simply die.
So whether or not you can still use it today, the bigger question is will you be able to use that website 10 years or longer into the future? Because any book ever printed can still be read today (assuming you know the script and the language it was written in), I think the longevity of the web will top out at a couple of decades at best before the digital termites and worms will consume the devices that could have rendered the content you are interested in.
Plain ascii text will likely live the longest, with markdown as a good second. Anything that executes will likely simply die.