Feature request: sen2cor with 30m SRTM DEM


is there any reason why sen2cor uses only 90m DEMs?
Since the DEM is resampled to each resolution (10,20,60) anyways I would expect improved terrain correction by using a 30m DEM in the first place (or any other user defined DEM, really).

If the only problem is that 1arc second SRTM tiles are not available for API or FTP download, it would be great to be able to provide these manually.