Still have and occasionally use my mid-1990s Trinovids. A couple years after buying them, they developed a collimation issue and then the focus wheel began to malfunction. I contacted Leica customer service to get them repaired and they were an absolute nightmare to deal with - arrogant, condescending and insistent that I must have abused them (prior to even inspecting the device). They finally agreed to inspect it - almost a full year and many follow-up phone calls later I finally got them back. It was long ago now but seem to recall paying for the repair.
Have a 1000-R rangefinder that served faithfully for many years and is now malfunctioning. I’m debating if it is worth dealing with the hazing of Leica customer service again or just buying another rangefinder. Leica makes high performing products that I like to use for hunting but God save you if something goes wrong. Over the years my experiences with Zeiss and Swarovski were far better, especially Zeiss. In fact, when the center hinge of my old Zeiss Classic 10x40s finally wore out from decades of use, not only did they fix it and tune up the old binos for free, they actually apologized for taking longer than expected as they had to send this long-discontinued model back to Germany for proper repair.