It depends. Do you have the extra 5 minutes in your schedule? I get about 2-3 weeks on a single blade since I don’t shave every day and I also have a high tolerance for dull blades. So the disposable blades are fine for me.
RE: the maintenance of a straight, it’s definitely work, but if you’re doing it for more than just a quick shave, you’ll be satisfied. It’s still the best shave I ever got, so I keep mine around and I’ll shave about once a week with one.
Regarding the blades, they’re significantly less waste than a “modern” razor and they’re 100% recyclable. The only danger is that you need a proper blade bank to send them away in since they’re a biohazard and they risk people getting injured.