Looking for expert advice on S19 design

So, just to give you some background, I’m a miner working out of my garage. I’m reaching out to the pros for some advice. I had been operating five S17+73 miners for a while, but they’re starting to show their age. Usually, it’s the temp sensor that acts up. One of the units dropped a board, and I ended up selling it as is for $3300 a couple of months ago. I thought that was a decent deal since it was more than what I originally paid. Then another one dropped a board too. Same problem. I sent it off for repairs, but they told me it had too many faulty chips to fix. Just got it back today, and it sounds like a box of marbles; clearly, all the heat sinks got loose during shipping. So here I am with one broken miner and three still running. I’m thinking about selling everything I’ve got before they all fail me due to getting older. I did some calculations, and it looks like running two S19pro 100s would actually be more profitable than my three S17s right now. Financially, I reckon I can sell my current setup for about what I’d need to buy new S19s. The extra profit would make up the difference in a month or so. So, my main question to those who know their stuff... please reassure me that the S19s have better heat sink design. I just want something that’ll last more than a year without causing problems.

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.