How Bad is No Notice?

So I've been at my company for 7 months. Workload is very slow but more concerning is that in my time here they have had 8 C level people leave and a round of layoffs in May. I just got a fantastic job offer last night and accepted and I start next week. I was contemplating giving notice today and it was announced that the head of our department is leaving. Now I kinda want to just ride out the next few days and just send an email saying "Due to the extremely high level of employees leaving over the last 6 months, I'm resigning effective immediately. The lack of stability is extremely concerning and I'm leaving for another position" and bounce. I'm not leaving anybody with a ton of unfinished work and I would like to just leave the industry entirely so I'm not worried about a bad reputation.

Would I be kicking myself if I just leave?