What happens if you don't take care of your corrected teeth?

I received orthodontic treatment long after I became an adult. It has been over 10 years since I completed nearly three years of braces. It's been almost 13 years now, and during that time, the wire retainer attached inside my teeth has broken and fallen out multiple times, and I don't even remember how many times I've gone back to get it reattached... The orthodontic clinic I went to is far away, so I have to take leave from work each time I go, and since they are very busy, making an appointment is a hassle... I really don't want to go there. I can feel that the retainer has fallen off from my teeth, but I haven't gone yet. It's not causing me major discomfort right now, so I've been delaying... Honestly, I just want to remove the retainer and everything else... If it's not causing significant discomfort, is it okay to just live without any repairs?