People get bored of them I think because they aren't wild. They're well balanced, well refined, and dynamically tame. There isn't the wow factor there. They just perform well. It's something you don't realize until you use other products and then switch back to them. Every time you try something else and go back to them you realize how good they are, but you never really are aware of it when you're just using them. For example I had the IE8, UM3X, and SE530 as other earphones while I had my Triple.Fi 10. I had them all to simply try out for a few months and compare. The Triple.Fi 10 never really impressed in the sense that you say wow while you're listening. The IE8 had lots of bass, the UM3X and excellent sound stage and dynamics, and the SE530 outstand midrange and high detail. The Triple.Fi 10 was just sort of meh. However, every time you went back to the Triple.Fi 10 you could always see it was better overall. The balance and level of refinement was just better. I personally liked the UM3X the best but I'm a dynamics and sound stage whore, but from a functional, logical standpoint, I always saw the Triple.Fi 10 as the better product even though I enjoyed the UM3X more.
I think some people shy away from them because they do kind of break after a year or two. The cable can go bad and the glue used or the plastic itself seems to deteriorate/fatigue and break apart. It's really a matter of how you use them though, and it's not like glued plastic parts isn't uncommon in head-fi. It's just that Triple.Fi 10s are (were) not cheap and didn't last forever like they "should." Longevity is all in how you use it. I had an old set of generic Aiwa earbuds for damn near 20 years before the housing cracked one day (might have sat or stepped on them), 20 years! I really can't foresee my Triple.Fi 10s ever going back in the next few years simply because of how you use them. If you take them everywhere and toss them in your bag or pocket, you'll see a much shorter life expectancy.
Is the Triple.Fi 1o the best fit for you? I have no clue. Will you even like them? I don't know. All I can say is from a logical perspective, they are one of the better functioning options out there and one of the better values out there. For the $200 price limit, I can think of nothing else that is holistically better. Now I haven't used every earphone out there though, so my awareness of the entire spectrum of products is largely holed. For what I have used, I can really only suggest the Triple.Fi 10 as the most fitting.
If you want to look more, there are a number of reviews threads that have a LOT of the best options out there listed and explained in some detail.