Pretty much what I’ve been saying.
Instead of bitching, lets imagine stuff! That’s why I came here.
2020s: start a moon and mars base, SpaceX becomes a truly solid, profitable company.
2030s: a few new BFR models exist, and now a larger craft that is constructed and refueled in orbit ferries people around the solar system more comfortably and more economically than simply sending normal BFRs. SpaceX is now among the largest corporations by revenue and profits. Asteroid mining is a real industry, and artificially intelligent robotic spacecraft harvest resources from astroids, creating vast stocks of fuels and materials for building things in space and on other planets.
2040s: Mars now has multiple cities in different regions, almost like experimenting with different conditions. Elon Musk, now much older, diverts his efforts into beginning terraforming and designing a mission to a nearby star with the vast resources that now float around space.
2050s: Artificially intelligent robotcs build many things automatically now, without further need for instruction. 70% efficient solar panels power an ever expanding army of robots that gradually work to change the martian atmosphere to habitable. At this point, if there is any life on Mars to be discovered, it has been, and due to SpaceX’s missions in the 2020s, it has already been considered “too late,” though at this point deciphering martian life from terran life is trivial, and the economy and resource drive to have human life on Mars is too great and entrenched. Martian life is simple and doesn’t pose any threat to terran life, though the reverse isn’t true.
2060s: due to the exponential growth of self-assembling robots, Mars is now closer to being earth like. A project to establish a permanent magnetic field on Mars develops. The same manufacturing that allows this terraforming has transformed earth and Mars: rocketry is accessible to literally everyone on the planet after much political turmoil about artificial intelligence beginning in the mid 2010s culminated in a universal basic income for everyone and an eventual devaluation of currency and wealth itself. People find meaning through personal projects, though many struggle with depression due to a lack of purpose. Millennials now are on the tail end of having peak spending and political power, just as baby boomers do today.
2100: Mars is now actually habitable, climate change on earth has long been solved and humanity is now truly a space faring civilization, with colonies on a few nearby stars and all around the solar system.