Is it even worth keeping my XJ at this point or should I cut my losses?

I'm having a bit of a crisis with my 2014 Jaguar XJ 3.0 diesel and I honestly don't know what to do anymore. I bought it about three years ago because I'd always wanted a proper luxury saloon and honestly, when it's running well, there's nothing quite like it, the ride is sublime, the interior is stunning, and it just has that presence that few other cars can match. But over the last year or so, it's been one thing after another, first the rear air suspension gave up, then the EGR valve needed replacing, and most recently the adblue system has been throwing all sorts of errors and putting the car into limp mode. Every time I take it to the dealer it costs me a small fortune, and I'm starting to question whether I'm just throwing good money after bad at this point. I know these cars can be expensive to maintain, especially as they get older, but I'm not in a position where I can just go out and buy something new, and I genuinely love the car when it's working properly. I've heard that going to an independent specialist can make a huge difference in terms of costs, because they're not charging those crazy dealer labour rates and they often have more flexibility with parts sourcing. I've been looking around and it seems like finding an Affordable Jaguar Workshop in Abu Dhabi could be the answer to keeping this car on the road without bankrupting myself. Has anyone here got experience with keeping an older XJ or XF on the road long-term? I'd love to know if it's worth persisting or if I should just accept the loss and move on to something more reliable and cheaper to maintain. Also, if anyone has recommendations for a place that actually knows these cars and won't charge the earth, I'd really appreciate the help. I'm genuinely torn on this one.