You did not have that problem. You had a problem with CBU. Something that EA113 was know for. It was one of the first turbo DI engines. It is not issue that VW had a problem with brand new technology. It is issue that there are still companies having that issue 15 years after VW had it.If you have ever known someone who had to “replace the turbo” or “fix the egr” by tuning software you have heard of the issue.
most repair shops would never clean a turbo and will provide a bs reason for low power or turbo replacement
we do things differently in the sticks , replacing a turbo never happens.
On older rigs like the turbod 6.5 and 7.3 my mechanic would usually just delete the turbo if it actually went tits up for real, rusted out 25+ year old diesels usually aren’t worth getting a new turbo.
If you had port injection turbo VW (1.8) and that issue, it was poor maintenance not engine.
My VW is fine, starting at temperatures as low as -40 in winter in the Rockies, never skipped a beat since I have it. Which could not be said for my Toyota.