Most of the cars that have broken (locally and elsewhere) are making lots and lots of power. Not just JB4 and basics power... 600wkw+ and 1200Nm+
You can read my thread to see what I've done (and needed to have done). I am way past 100000km now. Daily driven. Plenty of long trips.
The only annoying thing for me has been the turbo coolant lines which can develop small leaks that cause you to smell vaporised coolant.
I've had clutches, brakes and suspension changed under plan which are probably the biggest items. Apart from the suspension (I would go with KW), I wouldn't have a problem doing these items out of plan either way.
If you are just out of plan and something goes badly wrong (and you have had the car for a good few years) they will goodwill even things like motors and gearboxes (or go 50/50).
@Veteran they are very reliable and moddable, but there are also plenty of broken 6 and 7Rs at the higher power levels I assure you :roflol: I also know of one person who broke his 7.5R 2 weeks after taking delivery... doesn't mean they are all bad.
Regarding value, you can have a 400wkw daily drive that (at that power level) is very reliable for under R500K. Jekyll and Hyde - it will cossett you in luxury and then become a complete animal if you need it to. There's nothing like it. Reality is that a 5 series of any kind is going to drop in value like a stone (second only to a 7er) regardless of whether it has plan or not. It is a big-car thing. An M5 is not likely to drop much further very rapidly at least.
If my motor breaks (I've done a health check at the last service and all seems well) and it costs even R200K to rebuild or BMW gives me a 50/50 goodwill on one, then I would do it. However do what everyone says and check oil religiously, do your 'phantom' oil service in between and pay cash if you plan on keeping the car out of plan. We can talk about modded cars or reliability or imagine that others are not spending tons of money building and rebuilding, but if you have really thrown money into trash like I have over the years, you will really appreciate an OEM motor that can do 150000km+ in a car that can make 400wkw all day long (or 500 LOL) for 'only' R200-250K.
The anecdotes of 30000km motor breaking and a broken gearbox just out of plan are just that... anecdotes. One or two stories doesn't make it crap. The polished and curated tuner posts of other manufacturers also don't mean anything (we have all seen the BS posts - '350kw daily safe tune... next time we will run even faster on the race file' after having broken a record, no evidence of anything ever breaking... customers pressurised into silence or taken on by the fanboys of the tuner... I've been there.)
This platform is now old... if it was this big of a disaster you would not find it repeated in the current gen. You would also have the internet full of complaints and subsequently fixes as with the E6x. If you have resorted to calling into 702 for an issue, then chances are you have no support system and you NEED ONE for a car like this, be it at a switched on dealer OR a place like TuneTech. This goes for any special car from any manufacturer.
Last is that these cars are extremely complex (as are all cars today). Learn about them... the physical and the software... so that nobody can BS you. If I read a thread like this, I would probably not have bought one. However many many km later, I am glad I did. It has become a trusted and reliable friend and actually I think I love it as much as I did my S2000. I couldn't imagine not having it in my garage.