Show HN: GS-Calc – A modern spreadsheet with Python integration

So I'll take a layman's view here since I've only cursory experience of the big data tasks that this software seems to made for. Or maybe the pitch is still different and it went over my head.

It loads quick, and works with large data. Crucially, you can view and edit visually, not only programmatically.

Assuming those already working with such data have Excel and Python tools etc., the pitch here is that the $39 license fee saves time or effort. So, is it that the user can spot and correct errors that you couldn't otherwise do with either Excel or with other big data tools? And/or otherwise do the necessary data manipulations?

I came across the phrase 'eyes like a shithouse rat' recently, to describe the people doing final checks at a printing press. I think there's probably plenty of people out there who would pay $39 for eyes like a shithouse rat.

Also the website makes me nostalgic :)

I like old-school UIs but I wonder if that look doesn't do the product a disservice. I think most people would find it much more appealing if it looked at least as good as tad and rowzero mentioned in other comments. My first impression was that it is some old, slow software from 30 years ago, and the plots are not what I would show to anyone (especially the 3d bar plots). But that's just the looks. Otherwise, the product is solid.

(Yes, I know that there is plenty of old software that is super fast.)

Yep, the website is being kept simple, in fact too simple and will have to be eventually redesigned. It seems the classic (and actually up to date) WinAPI GUI shouldn't imply the software is being "slow". One could have it both ways and say it's usually on the contrary where commonly cloned packages weighing hundreds of MB and performing relatively simple tasks get a free ride on users' ten(s) of times faster hardware. Then there is the Wirth's law, May's law etc.