tl;dr, podcasts are expensive to produce, about $1000/hour with video, hosts (local and remote), and post-production. TWiT is going through hard times and some shows and hosts have to go. Sadly, FLOSS was on the chopping block.
Advertisers just aren’t interested in podcasts anymore. If you still want to support the network after this, give Leo $7/month and join Club TWiT. I don’t give a rat’s ass about Discord, but I do want to prevent stuff like this.
Switching from Word to LibreOffice Writer was hard. Sure, I figured out documents on my own, but it still won’t print envelopes correctly (the printer doesn’t respect the margins and orientation compared to my Windows install).
I assume changing platforms and apps is harder when you use your computer to make money. I feel for the OP in the screenshot. Assuming his hardware is compatible, I’m sure he could take some time to learn a FOSS alternative but it’d be a while until he was proficient enough to make a living. The commenter was dickish but correct. Still, let’s not assume switching apps is as easy as switching gas stations.