Instead of taking hasty generalizations from owners with both good and bad experiences, let's look at a much larger sample:
Tesla slips several spots in Consumer Reports reliability ranking
That's Consumer Reports aggregate data from a large pool of owners - not forum posts, not a few owners recounting anecdotal experience.
Tesla has very poor reliability.
Even if you accept this report at face value, it isn't what they're asking about.
The OP wanted to know if the car was going to leave them stuck by the side of the road or in a garage one day.
CR is tracking number of times someone takes the car to a service center to get something changed. While Tesla has a higher number of these, very, very few of them are side of the road events.
CR is also comparing to other cars of today, all of which are better than they were in the past. Relatively high numbers of visits now isn't the same as high numbers of visits in the past, let alone unreliable from the past.