hi stephen this is not meant as a critisism or to put down anyone, but what does this say about most of todays BIR. thngs have changed over time and things have been lost, whether techniques and methods (ie ways of doing things) have changed ingredients have been sourced differently. many people who have been trying for many years since the 1970's at least to recreate the "old school curries" that they remember eating then. sitting in an aroma filled restaurant with flock wallpaper, poor lighting, indian music playing in the background etc. and eating the best curries with that taste and smell that they will never forget and never going to be able to recreate unless they can get hold of a very old 'indian/bangladeshi/punjabi' chef that will pass on that wisdom. it could also be due to health and safety reasons that things changed!
most peeps just want to able to recreate their locals madras or vindaloo or CTM and happy to get close just as long as they have the taste that they are looking for. regionality and personal taste differ greatly and so does what we are all looking for but a good curry will have that taste and this is your taste!
if you are cooking your curries and are happy and then someone says this taste and smells like a takeaway or better tahn a restaurant they have been to just smile to yourself and say thank you

kind regards
gary