Alternatives, are, well, alternatives. I’m all for alternatives but they are NOT the actual thing.
If one lives in a bubble and doesn’t to collaborate with others then native Linux apps might work and might even deliver a decent workflow with performance. Once collaboration with Windows/Mac users of a specific industry is required then it’s game over – the “alternatives” aren’t just up to it.
You can’t expect to waltz in some office and have people tolerate broken documents of some format and/or the subsequent productivity losses - it just takes you making a few slides for your boss while using LibreOffice and once he opens the document you’ve misaligned items, game over. :)
It also comes down to a question of how much time (days? months?) you want to spend fixing things on Linux that simply work out of the box under Windows for a minimal fee. Buy a Windows license and spend the time you would’ve spent dealing with Linux issues doing your actual job and you’ll, most likely, get a better ROI. Software runs fine, all vendors support whatever you’re trying to do and you’re productive from day zero. Sure, there are annoyances from time to time, but they’re way fewer and simpler to deal with than the hoops you’ve to go through to get a minimal and viable/productive Linux desktop experience.