> Alot of big companies do fine (financially) with the waterfall methodology.

Because it works for them. Right tool for the right job maybe.

I see companies trying to switch to Agile without even considering that they're applying it to the wrong projects, like big infrastructure ones. It's a buzz word and they have to go for it to look good. That costs.

I guess. Ime. all project are are combination of waterfall and agile. Wrt. infrastructure the initial architecture plan needs to be almost all-encompassing. On the other hand you need to be able to react to new information and changing circumstances. Being religious with methodology is going to backfire 99% of the time.

> Because it works for them. Right tool for the right job maybe.

They are able to deliver software in spite of waterfall rather than because of waterfall. They just keep injecting time and money until they 'declare' their projects to be complete.