I'm a leisure traveller only but foolishly did not get a frequent traveller passport last time and it was recently filled about three years before expiry.
Just renewed to a frequent traveller passport, so it may have been a blessing in disguise if they are due to be discontinued soon. It makes my BellRoy passport wallet a little more chunky - but the passport pocket in those is designed to take a FT passport. Mine's made a little thicker because I've stapled my vaccination certificate into the back of my passport.
I use the wallet, including containing my passport, on a daily basis without feeling it's oversized. Best wallet I've ever had.
Upshot, of course, is that the passport is always on my person and not in a bag where it might get damaged by spilt liquids.