Why I've Shied Away From Exit Tickets

I used exit tickets of a form and I thought that was really good and I was really happy with how that class went in general I haven't really used exit tickets since then. One reason is the processing load so I started to I would use them a bit but I just find like I would leave a class with like 20 responses and you're like looking at them at the end of the day, it's going to take me like 10 minutes to go through each of these piles. The validity of that assessment timing is for me a little bit questionable. It's more important to assess that understanding at the start of the next lesson rather than at theend of that lesson because as a student myself