We are all diferent, but I know of 2 people that used insulin from day it became available basically...and one of thrm has had same regime, food, insulin wverything for 30 years and still fit snd healthy... So it may just be a change in ur body needs, rather than insulin not working... Ie insulin resistance changing, getting older-lol!!
I'm on a pump and actually prefer it due to only needing one fast acting insulin rather than different ones at different times of day etc.
As for the comment on having a needle stuck in permanently... I'm lean and muscly and dont feel it at all.. And if you cansee and do multi injections everyday.. It a lot less bother doing one needle every 2 or 3 days than doing what you do..
I strap my pump to my arm and forget about it.. Literally!!! When going to bed, getting up, dressed.. Never worry about it.. Eating... Much nicer to pull out a remote control than an injection... Before bed.. No hunting for long acting insulin pen, no accidentally using wrong pen, no worries of taking pens everywhere all the time when going out.. Pump just permanently attached to arm...
Oldage creeping up on you guys... If you want to change.. Much easier to do before yourold age strikes at 40!!-LOL!!!