> did you make your client pay for each request _just as if you didn’t build such dsl_?
I'm not exactly sure what you're asking. Should you be charging clients for time that you didn't have to spend because you made some good decisions upfront? That strikes me as odd. If you agreed upfront on the cost for a certain end result, then sure, charge that full agreed-upon amount even if it took you less time than expected. But it seems odd to say "this change only took me an hour, but it would have taken 10 hours if I had made worse choices in designing this system, therefore I'm going to bill you 10 hours." After all, there's always a hypothetical situation where any given change could have taken arbitrarily more time if you had made worse decisions in the past.
I'm not exactly sure what you're asking. Should you be charging clients for time that you didn't have to spend because you made some good decisions upfront? That strikes me as odd. If you agreed upfront on the cost for a certain end result, then sure, charge that full agreed-upon amount even if it took you less time than expected. But it seems odd to say "this change only took me an hour, but it would have taken 10 hours if I had made worse choices in designing this system, therefore I'm going to bill you 10 hours." After all, there's always a hypothetical situation where any given change could have taken arbitrarily more time if you had made worse decisions in the past.