[ManBeardPc]

Huge barrier of entry. It requires a lot of integration and investment. Getting another supplier to move usually involves handing over big bills. Even then it is not guaranteed that the change is (fast) enough. I see it all the time, nobody gets their ass up unless it’s on fire. Still some companies will claim „at least it’s warm now“. „This is fine“-meme is real. Resist change at all costs.

I’ve seen companies losing their by far biggest customer because they refuse to hire real engineers instead of juniors to fix their software. The customer tried YEARS of complaining before.

Another customer: different suppliers use different barcode patterns for deliveries, some including nasty stuff like NULL as separators (but only sometimes, can be space, tab, whatever) or non-unique IDs. They rather spent the effort to fix everything else with workarounds than change the contract and demand proper barcodes/delivery data.