I totally agreed with you, since Surface Pro 4 is a failed product, at least the issue is still unsolved.
Microsoft should either refund or upgrade at a reasonable price to Surface Pro 4 existing users, in order to re-gain their brand reputation and customer. I won't mind to upgrade if the new Surface Pro (5th) or Surface Laptop has no such problem.
Honestly, I did not recommend and also discourage my friends and family members when they ask my opinion on Microsoft product, software is okay, hardware is no, a BIG NO.
We have 3 Surface PRo 4 devices which all started with this issue within the last few weeks. Contacted Microsoft and they said that the y only replaced devices until April 2019 and now have to pay for a replacement of a device that has a known manufacturing defect!
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