Sure it is. The Wii U is cheap if you do a good search; Gamecube, Wii and Wii U (and a lot of emulation+hombrew apps-games-ports) natively, semi-portable and without any issues is simply worth it. GC/Wii/WiiU emulation is almost perfect nowadays, but I still opt for the original hardware.
What does the year date have to do with such questions? "Is […] worth it in […]?" Either you want a thing and have use for it – or not.
As already mentioned above: The Wii U is an excellent emulation machine and able to play most Nintendo games from NES/GB up to Wii U.
That said, I prefer the Wii¹ as an emulation system because of its fast boot time, better resistance to softbricking (I tend to try out things and play around…) and simplicity – as well as the native controls for GameCube games. So my Wii U serves only one purpose: Playing Wii U games. The library might be small compared to other consoles, but there are still plenty of Nintendo first party titles which I enjoy.
With or without using emulation for older systems (as well as the backwards compatibility with Wii games and the Nintendont hypervisor for GameCube games), I would say the Wii U is worth having.
Good luck and have fun!
_________________ ¹Note: The Wii doesn't have digital output by default while the Wii U has HDMI which is a plus on newer TVs that lack analogue inputs.
Depends on what are you looking for and if you have a Switch, many WiiU ports are on the Switch so if you have one kinda defeats the purpose on getting one for the reason of playing those games, and if you're not concerned about the ability to play GC/Wii/DS/VC games on the system, then prolly no.
there also exists a usb to gamepad format cable to charge the gamepad as you play. they make them pretty long too, in case you care about that. I bought one, but I also have the larger battery direct from Nintendo when they were selling them.