Aside from the problems of achieving net positive output, there are practical problems that are far from being solved. The laser ignition demonstrated here has no practical path to producing power. Neither does magnetic confinement used in the Z-machine. The tokamak designs that are the primary focus use tritium, which is far more rare than most people realize. There are ideas for doing tritium generation on-site using lithium-6 blankets that capture neutrons and generate tritium (L6 + n -> He4 + T), but this has yet to be proven to work in practice. The Wendelstein 7-X stellarator is supposed to work using only hydrogen and deuterium, but it is also highly experimental, and it's not clear that it will ever achieve net positive output. No one expects anything within the next ten years. ITER is years behind because it's proven much harder than expected: first plasma and full fusion were originally scheduled for 2020 and 2023, respectively, and now those dates are 2025 and 2035. The companies that were all the big news over the last couple of years have only rarely made public admissions that they do not expect net positive output before 2035 or 2040. Once some design has achieved a net positive, it has to be shown to be economically viable, and then the plants themselves have to be constructed. That's another 5-10 years.
Realistically, battery technology will advance so rapidly that fusion research will likely drop back to a niche. Sodium-ion batteries are a major focus right now, with claims of being able to produce 160 Wh/kg batteries for $80/kWh now and $40 within a year or two, with the benefit of no conflict minerals, and in fact, using materials that are available at low cost throughout most of the world. There are iron-oxide flow batteries already in testing (Sacramento, CA, expects to connect theirs to the grid next year after they finish isolated testing) with absurdly low battery costs, though they require much more space. And there are other chemistries being looked at, too.
Battery technologies are where wind and solar were around 2015. There is much promise, and it could take off much, much faster than any of us expect. They could, like some building UPS systems, be the actual issuer of power in many places in a decade, with power plants feeding the batteries and the batteries feeding the grid, keeping a stable supply even as plants come on- and offline. And we may look back at the race for fusion and wonder why it seemed so important.