The first part of the answer is why do we use glue-ins. The Marine environment is a brutal one, especially for metals. Any time you have 2 pieces of metal touching (hanger and bolt), especially if they are 2 different metals, there is a possibility of corrosion. Salt

water speeds this up because it acts as a conductor and speeds the chemical reaction that is corrosion. This was most notable in Thailand where burly 1/2 inch expansion bolts were placed in sea cliffs (much like Flat Rock) and were rusted out inside one year. There is a theory that the chemical composition of the rock lead to the corrosion. Using a one piece glue-in avoids this contact of two metal, and the glue makes a chemical bond with the rock so water can't get
in and cause trouble. It is the way to go for sea cliffs.
So why the hell did I use an expansion bolt? There are multiple pieces and are not as strong as a glue-in. Whats up? Well what I put in was a stainless steel Triplex Bolt from Fixe. Stainless steel is the least like to corrode and the Triplex has only 3 pieces (hence the name). What the real beauty of this bolt is that is is removable! I can easily pound this thing
in and pop it out anytime I want. It is a 1/2 inch bolt which is bigger that the standard 3/8's found in most climbing areas. It uses the same size hole as the glue-ins so when the time is right, I will pop out the Triplex and replace them with glue-ins. So when you see the expansion bolts on Candy, don't freak out. They are solid and can be replaced with glue-ins at any point. I am going to leave them for a while to see how they mature.
unfamiliar with the ethics of developing, they are basically the unwritten for an area when putting up or maintaining routes. For example, the Gunks in New York State is a hard core trad area where only the people who are allowed to place bolts are the park rangers. The opposite would be Rumney, New Hampshire where sport climbing runs supreme and even long cracks are bolted. Obviously a different philosophy. This is the basis of "bolt wars" where a guy bolts a crack and a hard core trad climber comes by later and chops all the bolts...bad blood!
