I would think this would be a massive topic of debate on the UK site as most issues seem to be from that area.
As for possible temperature issues causing this I have mentioned before that I have a friend with an old Ducati Paso. It has two large oil coolers and no thermostat. During cool weather he puts foam in the ducts to block off air flow. If he did not do this the oil would never come up to temp. If you told him you should not need to do that with a modern motorcycle he would laugh at you and likely suggest that you should buy a Honda if you do not want to put in the effort that owning an Italian lady requires.
Whatever the cause, it does not appear to be a uni-lateral issue at this stage as most do not have this problem. If it was as simple as bad tappets they would all still be failing. There must be other factors that continue to cause the issue in some regions while in other regions it is mostly a resolved issue. It could be parts supply (the bad parts are still being supplied, seems unlikely), temperature or oil quality issues (low ZDDP levels due to govmnt regs or water contamination from not burning the water off), or poor set up/maintenance. Or something else entirely, but there is likely something different causing the issues.
As for possible temperature issues causing this I have mentioned before that I have a friend with an old Ducati Paso. It has two large oil coolers and no thermostat. During cool weather he puts foam in the ducts to block off air flow. If he did not do this the oil would never come up to temp. If you told him you should not need to do that with a modern motorcycle he would laugh at you and likely suggest that you should buy a Honda if you do not want to put in the effort that owning an Italian lady requires.
Whatever the cause, it does not appear to be a uni-lateral issue at this stage as most do not have this problem. If it was as simple as bad tappets they would all still be failing. There must be other factors that continue to cause the issue in some regions while in other regions it is mostly a resolved issue. It could be parts supply (the bad parts are still being supplied, seems unlikely), temperature or oil quality issues (low ZDDP levels due to govmnt regs or water contamination from not burning the water off), or poor set up/maintenance. Or something else entirely, but there is likely something different causing the issues.