Rancilio - Rocky

Yes, it is that much better in the long run. You mention that you cycle through 4-5 bags of beans but has any of them ever "wowed" you or stood out with some clean and standout flavors? It's really hard to achieve with a blade grinder because with the uneven grind size, the fines have more surface area and will over-extract leading to bitter notes, the boulders have less surface area and will under-extract, getting sour notes. This will lead to a muddled cup. So all beans kinda just taste the same. I would highly recommend getting a burr grinder as it will just augment every single cup of coffee that you brew moving forward. It's like a value modifier that is applied to all your beans that increases its taste. If you buy lets say low quality dark roast beans then I would say it is less of an issue (getting a burr grinder that is) and that there aren't that many tasting notes you can extract from those to begin with. As for grinder selection, if you don't mind some manual labor, I would recommend something like a Timemore C3. I have one of these and it works great for me. I downgraded from a Rancilio Rocky as it was too much (and too loud) for my needs. If you want an electric one, the tried and tested Baratza Encore works great for most people.

Do you want to see my 15 year old Rancilio Rocky Doserless still going strong? Sheesh.

I bought one of those 300 dollar grinders from Rancilio two decades ago. It works perfectly every time.