Hmmm. The EF 35-80 USM was one of a series of lower-end Full Frame units. If you are considering getting a digital camera it would work physically with a DSLR: either full-frame or crop-sensor APS-C.
However, if you are considering moving to the new R-series mirrorless cameras, which are where the future lies, then I would honestly say it will not do justice to the new bodies available. The new mirrorless units have a new RF lens mount and thus you would need to get an EF -RF adapter. The quality of the lenses has improved dramatically over the years and to make the most of the camera body I would strongly encourage you to get lenses for that platform, even if you keep your current lens - you will be amazed at the difference.
If I can suggest reading the following and considering the questions it poses, it may help you express what you need in terms of what and how you shoot, by sharing that information we can offer relevant advice to help you make your choice. Buying Cameras and Lenses
cheers, TREVOR
"The Amount of Misery expands to fill the space available"
"All the variety, all the charm, all the beauty of life is made up of light and shadow", Leo Tolstoy;
"Skill in photography is acquired by practice and not by purchase" Percy W. Harris
