I think you've done a great job.
like many, I tend to look here when I have a query or problem with the kadjar (thankfully more queries than problems). I plan to keep the car for a few more years so would be very sorry to see this site go. That said, it is clearly not reasonable to expect you to give your time to this ad infinitum. I guess there are probably few people who have both the technical capability to run the site and the inclination to do so. If there is a way to "freeze" the content and make it available in a one-off way that would perhaps be the best middle-ground option (though as a non-techie I have no idea what I am talking about!)..
All I can do is echo the appreciation of others here and congratulate you on your effort and commitment over the years.