Fair point. I think the fact that you can simply bolt them on if you've already installed the ancillary upgrades (intercooler, downpipe) vs a big turbo setup that can require a lot more work depending on whether you go with a pre-built kit or not. This is especially so if you're talking about a custom build that may require more boost management and tweaking to get both good power output and reliability.
This is interesting, and understandably not uncommon in the aftermarket performance parts industry. Not trying to call you out or anything, but we've never had issues with running their upgraded TTRS turbochargers, and we've installed several to date. Unfortunately we haven't had a lot of Gen 1 TSI installs just yet due to the lack of public knowledge on them, and of course, the aforementioned price hike over your standard K04. At least there are finally a few tune options available now. I will take this into account and have my technicians double-check the tolerances on the next turbo that we get in from them though.
To everyone involved in this conversation, my intent is not to debase anyone or their preference of turbocharger; I simply enjoy hearing multiple opinions and experience from several different viewpoints. If you think I'm doing something to attack you, my sincerest apologies, that is not my intent at all. This should be a simple, civil conversation among adults to help improve the community, not tear it apart.