This is from an article by jason schreier on obsidian
Last year the developer released three games—a rare and impressive achievement for a studio of its size—but two of them failed to meet sales forecasts set by Obsidian’s parent company, Microsoft Corp. “They’re not disasters,” Urquhart says. “I’m not going to say this was a kick in the teeth. It was more like: ‘That sucks. What are we learning?’”
While Grounded 2 was a big hit, the disappointing results from the other two have led Obsidian to “think a lot about how much we put into the games, how much we spend on them, how long they take,” Urquhart says. Both Avowed and The Outer Worlds 2 were in development for more than six years, inflating their production costs and the company’s financial expectations. One of Urquhart’s missions is to cut down development timelines to three or four years per title.
This is surprising to me because avowed and OW2 don't feel like huge RPGs that took 6+ years to make, and that's going to be expensive since obsidian is in the heart of southern california.
Releasing them all in one calendar year made for a slick marketing beat—the “Year of Obsidian,” as Xbox called it—but it also taxed the studio’s resources. The group has around 280 employees, far fewer than peers such as Baldur’s Gate maker Larian Studios (more than 500) or Cyberpunk 2077 maker CD Projekt SA (more than 1,300). Obsidian’s support teams were stretched thin, with frazzled staff leaping frantically from one game to the next. “Spacing those releases helps the company manage its resources and not burn everybody out,” Sawyer says. “It’s not good to release three games in the same year. It’s the result of things going wrong.”
Some bonus info here that I don't think was ever public info
New Vegas ended up costing about $8 million—a relative bargain—and took less than two years to make.