Well if it is a commoly used hypertension treatment, the why can't GP's just change patients prescriptions now? I mght ask mine soon. Always thought that if the Beta cells were destroyed then they wouldn't recover. I think it is more likely to work for newly diagnosed patients due to the 'honeymoon' effect.
It sounds like a chance discovery, so we probably wouldn't have known earlier. Also "big pharma" would need to curtail any research to prevent their diabetes profits being reduced. There are other examples of commonly used drugs that have beneficial effects for different diseases, perhaps the most notorious being Thalidomide, that is now used to treat skin lesions and multiple myeloma.
So, granted that it could have a much bigger impact on T1s it still seems relevant to all diabetics.
Wouldn't it be nice to find that there was a drug (with no major side effects) which could reverse all diabetes?