I still keep one VHS deck for transferring old VHS tapes to DVD (connected to DVD recording deck).
There are a lot of really neat sci-fi (and other genre) B-movies that are out of print and will never get a release on later formats. Also, if you're a fan of classic Doctor Who or other British 1960s/70s sci-fi shows, well, those were largely filmed/mastered by the BBC on standard definition video equipment, so later blu-ray/DVD releases of these can't improve much on the standard definition image quality of the commercial VHS tapes sold in the 1980s/90s. Therefore, it's worthwhile to buy used copies of these shows on VHS for very little money as opposed to buying them on DVD/Blu-ray (which is quite expensive if you want to buy dozens of episodes).
Also, I've used the VHS deck to transfer old family home videos from VHS, and done this for friends too...so for me it's useful to keep one around for archival preservation/digitization.
Another fun reason to keep a VHS deck is to use as a "time machine". There are people out there who roam the garage-sales (boot sales) and pick up box-loads of old VHS tapes recorded off the air by people at home in the 1970s/80s/90s. They then scour these for old TV-shows, news shows, commercials, etc. that have never been archived anywhere else. Sometimes, even the original content producer didn't keep a copy. For local news shows / public-access channel shows / etc. sometimes the off-the-air copy is the only surviving one. Archive.org and YouTube are full of rescued TV content salvaged from old garage-sale VHS tapes.
Just from an entertainment perspective, I was surprised when watching an old VHS movie how the slight blurriness, VHS picture quality and occasional dropouts actually had me feeling nostalgic! I enjoyed those artifacts as much as I enjoy the warm sounding light pop and crackle of an old record.
And lastly - while eye-poking, pore-counting Hi-Def sharpness is nice and all - in the end it's about the quality of the content, not how many hairs you can count on the actors' heads. I'd rather watch a good movie on VHS than a poor movie in razor sharp Hi-Def.