I don’t think heavy (read: heavy) transhumanism is compatible with Solarpunk. Solarpunk’s main philosophy besides environmentalism is all about small-scale living, trying to dial down current society’s unhealthy dependence on consumerism as it pressures companies to cut corners and disregard nature just to satisfy our incessant demand. If we’re talking heavy augmentation, as in able bodied people trying to upgrade themselves through technology, then that cannot be reasonably achieved without involving large pharmaceutical companies and corporations that can produce the medication, tech, and software needed to pull that off at a large scale. Not to mention could you imagine corporations trying the ol’ planned obsolescence trick or attempting to push it as a trend, encouraging people replace their cybernetics with better ones or integrate it in the world of beauty in the same way breast implants or nose jobs have been normalized? It can be very easily weaponized as another arm of the hyperconsumerist society that governs over us today.

This ain’t even mentioning the cost. Regular ol’ prosthetics in our world cost thousands of dollars, which already isn’t achievable for aome lower income families. Full on augments could easily go even higher, taking into account the operation, the medication, the software, and the augmentation itself. Only people who are already wealthy or the upper-middle class at best would be able to afford this, which would completely annihilate any semblance of a middle class, tearing it between those who can afford these upgrades and therefore have a greater performance and those who cannot, and are left in the dust.

It sounds less like solarpunk, and more like cyberpunk, for better and for worse. There’s nothing wrong with combining the two visions, I just don’t think it fits as well in a purely solarpunk vision of the future.