I had problems with my s17s after a year (S/T15s were even worse!) Sold them all and moved to S19s. One failed during warranty and bitmain swapped it out very quickly. It gets hot and humid here so I take extra precaution during the summer to keep miners under 95F. Heat and humidity kills all miners. If you are running where it is cold you should not have these issues. I think they are about the same quality-wise. I really liked my first S19pro but then when the issues started I moved them to cool environment and have not had any problems for 4-5 months.
Appreciate the response. Didn't have many problems with my s17s. I'm in a cooler climate and my airflow is excellent where they're set up. But when I did have a problem, usually after about a year, it was almost impossible to ship them out and get them back without heat sinks coming off in shipment.
I did do some research after my initial post and learned the S19 has a different heat sink design. Got all my s17s sold on eBay, and ordered a few s19s from bitmain. Can't complain, I easily got 3x or more selling them than what I paid for them 12-18mo prior.
Was afraid they were reaching the end of their life in terms of reliability, so got rid of them before they were worth nothing.