Yes, a lot of stuff appears completely handrawn, but actually uses CGI for it's 2D effects.
Computer technology is pretty much always used in what appears to be completely handrawn animation. Lots of work on frame sequences for things such as colour correction in the computer, or adding additional 2D effects that appear in the background such as sparkling fairy dust for example etc, or just simple touching up effects using graphic tablets to correct certain frames.
I get the feeling that some people have a romantic image of the traditional handrawn look of 2D animation being one person who lovingly hand draws each individula frame.
The truth is that the key animators draw the key frames, and many (sometimes hundreRAB) of young artists have to draw the inbetween frames, and have the pressure of a deadline to meet.
I can imagine it being almost like slave labour for many young artists, as they will put the donkey work in, but it's the key animators who'll get all the credit.
I imagine that technology arriving to take the donkey work out of the process is a blessed relief to many artists.
Even in the golden age of Disney they used to "cheat" with technology where they could.
In some of Disney's classics such as Snow White, or Sleeping Beauty, they used to trace drawings over film frames of actors moving. It's called rotoscoping. It's the equivalant of using motion capture for 3D animation nowadays.
You'll still always need artists to draw things by hand, even for 3D animated movies. You need to hire the artists who actually design characters and produce the hand drawn representations that the 3D model versions are built from.
A 3D character, or an environment, is always created based on the designs from the original artwork produced using traditional methoRAB.
It's not like technology does all the work in 3D animated movies. They still hire traditional 2D artists and designers,..and even the 3D work is art in it's own right that has to be crafted by talented artists.