I don't think I've ever seen a manufacturer post a rated click life for a machine. They can go for 10's of millions if you take care of them and replace parts. And to correct your previous post, there is no 1252, there was a 1052 (105ppm) and a 1250 (125ppm). While the 951 may look similar, it is a lower amperage engine and will not print on coated sheets, plus it doesn't offer vacuum feed like the 1052 and 1250...but it is still a very reliable unit. The Pro 1100 replaced the 951 around 2018...and it still doesn't support coated sheets. KM manufactures parts for a minimum of 7 years after last year sold. The 1052 and 1250 were replaced about a year after the 951 (in 2019) by the 6120 (120ppm) and the 6136 (136ppm).
We ran into an insurance thing last year and Xerox said our J75 had a lifetime max on the number of clicks but the Versant 2100's didn't. I don't remember what the specific numbers were, it ended up working in our favor but I do remember that being an issue.