I still have a Vertex from 2009. Well into the age range when write endurance was a real issue. First generation beyond the stupid expensive SLC-drives that was somewhat feasible as an early adopter OS drive. Used it for years. Hammered it hard too. SSD Life Pro says it is good and done. Still, it works fine. Performance is also still as advertised. This is the thing: not only is it very hard to actually burn through the rated write cycles in anything resembling normal operation, after that they tend to outlast well beyond their rating.
Now ... this is a small drive. I used it on a OS without built in TRIM support, and even internal garbage collection wasn't available until much later with a firmware update. Write amplification was very high. And even that didn't kill it. An SSD, even an old one like this, can take a lot of abuse. Modern drives are so much better in all aspects, and to kill them you have to torture them for years. Deliberately. And even then it is more likely the controller will fry before the cells are worn out. This is no different from a HDD. Before the actual platters wear out, other failures will kill the drive long before that. So, this whole argument that an SSD can't measure up to a HDD is just silly. Especially considering how typical home use doesn't even tax a drive to the same order of magnitude as these extreme scenarios.
I really wouldn't worry about 100, 1000, or even 10.000 MB of writes to a SSD a day. At that rate it'll not hit its rated write endurance for many, many years. Well beyond its useful lifespan. And even if it does, that doesn't automatically mean it will stop working. And I don't thing Avast actually writes gigabyes of data a day to the drive. Neither do other programs. And if one really does, you probably know about it and have the SSD for that exact reason. To speed up that program.