You may like this pattern of starting all custom commands with a comma - benefits against a wrapper command would be shorter command names and built-in tab completion.

• pdfcrop (commonly included with LaTeX) for cropping margins - it cuts the pdf down to its contents then adds a margin of your choosing, extremely useful for forcing academic papers to have consistent margins, pdfcrop --margins 72 *pdf here* will create a document with a ~1in margin all around (it uses bp as its units)
• vips for resizing/converting images - it’s a bit faster and lighter than imagemagick in my experience, although the main reason I use it instead of imagemagick is just because I like playing around with stuff I haven’t used before :) It has an officially supported python binding too

I’m a software nerd, my biggest priority is keeping Android up-to-date on security and features, so it really seems like Samsung would be the best fallback option with a proven track record of getting security updates out as quick (or quicker) than Google and typically promising 4 years of OS upgrades/5 years of security patches (here’s an article with many phone manufacturers policies). I’d really miss the stock Android experience and unlockable bootloader though!