What's Your Biggest Lesson From Computer Vision?

i've always worked with computer vision problems. That's in my focus. So whenever someone says, you must learn sequel, i'm like, i don't know any sequel. Am, and a lot of what i do continues to remain in tha similar kind of veiniht. Is there something i wish i could have learnt earlier? I would kind of say, why then, testing strategies. Rigt, how do you formulate test strategies for a code base? And i just feel like, even from something like, oh, you can simulate g c s in your test, right? That's like mind blowing to me. Wish i'd known that couple of years ago.