People are often advised to not lock their knees for a long time while standing (ex: marching band, or standing at attention in the military), and you cannot force anyone to have healthy posture. The ergonomics of these seats appear to take some of the load off the legs and feet, but it’s something to consider for patrons with more sedentary lifestyles. Many people believe themselves to be fit individuals until they are placed in uncomfortable conditions for a long time or experience unexpected stress. They could manage to injure themselves in some way, then find some reason to litigate.

I’m fond of the Phand.

Linux has been ready for some time within various educational programs, but maybe you are referring to relatively early education curriculum in public schools? The general anecdotes I’ve heard from teachers within a variety of grade levels in the USA (mostly elementary and high school levels, but some doctoral engineering/scientific as well) convey that the largest hurdles to overcome are:

1. Teaching the teachers. Teachers are usually very smart and capable, but are often chronically overworked, overstressed, and underpaid for their labor. They have limited mental bandwidth in learning new tech workflows while having the added obligation of teaching these workflows to students which may be at an attention/interest deficit.
2. Challenging the status quo at the administrative level. Schools often receive incentives, grants, steep discounts, etc, for installing certain types of hardware or software packages. The software baselines of some schools are restricted at the district level; many public libraries are restricted by the city/county. Perhaps the best approach here is to install Linux as a “secondary” option (similar to how a smaller number of e.g. Macs may be installed in a computer lab comprised mostly of Windows computers) until it’s more widely adopted.
3. Advocating for equivalent Linux support for popular proprietary software. This is especially true for the creative design community, such as graphic design and professional music production. Adobe is usually the target of criticism here; Linux does not currently hold enough market share to capture Adobe’s attention while their patrons usually have unwavering brand loyalty or are unwilling to make any tooling/workflow compromises as to maintain their livelihood.
4. FOSS-friendly awareness campaigns. Showing people that they can remain productive while not being at the mercy of Big Tech. Not using public funds for private industry.
5. Feature parity case studies compared to proprietary options.
6. Overcoming the stereotype that Linux is only for techy people, shrouded by gatekeepers, or subject to drama/infighting.

“No mames” is a slang phrase in Spanish which is used to mean “no way” or “you’re kidding me,” but with a crude connotation, similar to “no f—ing way” in English.

Google Translate shows it as being more vulgar: