It's like buying a laser printer rather than an inkjet.Thomastiks are only expensive if you plan to replace them in 6 months.
When you use them for a decade, the relative cost is actually not that much of a factor.
In my experience, flatwound strings generally last a very long time, I had a set of Labella DTFs on my P bass for years. Is there something to Thomastiks that make them last even longer? Surely they mellow out over time like any other string?

