I have a feeling from reading this thread, a lot of people haven't actually read much about the case. Here are the basic facts:
He has been convicted of 159 attacks - 136 rapes, 8 attempted rapes and 15 indecent assaults on 48 victims.
That's 48 victims, out of 195 victims that the Police know about because they have videos of 195 different men being attacked. Of whom 70 have been identified. 136 rapes against 48 men - so the majority if not all were raped at least twice, some three times.
Those videos were made between 2015 and 2017, so all 195 men were attacked in a two-to-three-year period.
There have been four trials over 18 months for this man because he refused to admit anything, so like a lot of rapists, putting his victims through the ordeal of testifying and cross examination.
This man has been in the UK since 2007. We know he attacked 195 in a maximum time frame of three years, but possibly within two. Therefore as it is unlikely he suddenly started attacking men in 2015, and if he had been attacking on the same frequency from 2007 there would be some 800 victims all told.