Comment by conz

Re: "Or can I use the built-in Software Manager (FWIW, I really like the one in Mint, except when stuff isn't available on it.)"

I think this (built-in Software Manager) is probably the right track for most normal users. Last time I checked, the Debian software repo had over 120,000 packages, so for most normal users, the bulk of what they need is likely there and thus likely easier to install than apps on MacOS or Windows. My usual track record for installing a new desktop for family members, including the top 100 apps they likely need, is under 30 minutes for Linux. The last time I tried this with Windows, it took days of effort and frustration and to some extent opened the computer up to security risks because of the multitude of binary sources I had to trust.

But yes, once you start needing specialist software, then your-mileage-may-vary. Having said that, apps like Blender are already in the Ubuntu repo, which should mean they are also in the Mint Software Manager, and thus a single-click away from installation.

In general, I would consider Linux to be the easiest platform to install software on for the most common 80% of the software that normal users need. It's certainly the easiest to maintain and update that commonly used software of any of the mainstream desktop OSes.

Again, I think a lot of the mismatch of norms & experiences comes down to what someone becomes accustomed to. If you're accustomed to downloading an installation binary (EXE/MSI) and double-clicking that to install on Windows, then you can become accustomed to downloading an installation binary (DEB/RPM) and double-clicking that to install on Linux (viz: https://www.youtube.com/watch?v=OOPQPrzmnw0).

Cheers.