Back in the day, we had a mapper. One of the players would have graph paper and do their best to map out the dungeons. I don't see that so much anymore. Not even with my own group. There is some speculation around that. For example, it takes A LOT of time for the DM to describe the room in detail, and then map it out, and now as adults with jobs and kids and families, our gaming time is limited so we don't want to spend it on mapping. The other thought is that also back in the day, you had to map when you played video games. Due to graphics and non-smooth movement, every tile looked like every other tile and if you didn't map, you'd get lost. Is it a coincidence that our desire to map in D&D stopped at around the same time video games started doing the mapping for you?
So how to you handle it? Many times, I'll print out the actual map with all the details blank, and just let the players use that as a reference. It just speeds things way up. But I feel like it's almost like cheating that way, and the players are missing out.