Yah so Open Source projects, even GPL ones, need to have a non-profit foundation or Co-operative organization housed around them to be sustainable, if not eventually your favourite project will be sold off at some point in time when the project maintainer retires, gets bored, or wants to cash out.
I think we need to start socializing this more that Open Source != noble project you should support. Especially with the big tech companies embracing the concept and stripping the ideology behind it. The fact that Google doesn’t allow GPL code should be a red flag for anyone using BSD/Apache/MIT.
Not to detract from these guys because this is a dope release. But there’s a relatively new online collaborative open source one called PenPot that’s similar to Inkscape worth checking out too.