Its great to see this wonderful conversation about techeiles. I spent a lot of time learning about it last summer, reading the articles for and against. In the end of the day no one can say that it is certainly wrong and no one can say it is certainly correct. It’s a safeik. Some argue safeik deoraysa lchumra so one should wear techeiles. Some give some reasons why it may be problematic if it is not real. Everyone should follow a respected posek who has researched the matter (I personally thought I should wear, but was told by a posek not to based on the brikser approach that a mesorah is needed.)
Earlier people were discussing what gedolim wear techeiles. A number of massive talmidei chachamim in the dati leumi world wear techeiles and some Hareidi gedolim wear as well. Here is a list of those who wear:
Rav Tendler has also written pro-techeiles, although I have no information regarding whether he actually wheres it.