I feel like this has come up before, possibly in this very thread...
There are a couple different usages of "reboot" when it comes to popular media.
In actual professional entertainment-industry publications, you will see the word being used in the sense of giving new life to a franchise that may have been dormant or just in need of a kick in the pants, whether the new production is "in continuity" with the old stuff or not. The new "X-Files" seasons from a few years back "rebooted" that franchise even though they were in the same continuity as the older stuff.
Our use of the word "reboot" as laypeople on the viewing end has come to be much more restrictive, referring specifically to the "in-universe" continuity rather than the overall franchise, and generally meaning that the old continuity is being scrapped and replaced with a different continuity.
Which one makes more sense? "Rebooting" a computer doesn't scrap the whole system and replace it with something new, after all.
Yes, there is a disconnect between the industry and audiences when it comes to terminology. I had a media professor who had years of professional network television experience in producer and executive producer roles, even taking time off from academia each year to continue such work, and he had never even heard the term "jump the shark" even though it was thrown around all the time in fandoms.
Kor