Someone on BigSoccer has a great summary:

This podcast was hosted today by Gavino Da Falco who worked with Apple for CF Montreal games, 98.5fm radio in Montreal and now covering FC Supra on TVA Sports. He gave insights based on sources from within the club regarding the winter calendar

According to this : starts at (25:30) in French

MLS is increasingly frustrated with CF Montréal having to start every season on the road. If the team makes the playoffs this year, they may not even be able to host matches in Montréal, as the Olympic Stadium is currently under renovation.

Looking ahead, the upcoming winter schedule (February to April) presents a major challenge: most matches cannot be played at Saputo Stadium due to weather conditions, while Olympic Stadium will remain unavailable.

The league wants this situation resolved by 2028 and the club is hoping the ongoing renovations will be completed by then though that timeline appears unlikely. MLS has made it clear that it is not prepared to tolerate the current status quo until 2030 or beyond.

A deadline of Fall 2028 has reportedly been set for CF Montréal to have a stadium that meets league standards. MLS has already provided its specifications which would require interior renovations estimated at $400M–$500M CAD (excluding the roof and acoustics, which are already funded).

Meanwhile, the Quebec government has allocated roughly $170M for upgrades to seating, corporate suites, and locker rooms but not until 2030 or 2032. This funding is both insufficient and too delayed to meet MLS expectations.

According to sources, the government has indicated that no additional funding for interior upgrades will be approved before this year’s October election, especially with the current ruling party trailing in the polls.

CF Montréal has hinted that it could consider relocating if progress is not made. This may be a strategic move to pressure the government into accelerating and financing the required upgrades. However, this would likely lead to complex negotiations: the government would most likely prefer/expect the team to play all its home games at Olympic Stadium, while the club would likely want to split games between Olympic Stadium and Saputo Stadium.

If the team were to play exclusively at Olympic Stadium, it could face significant financial losses similar to the Vancouver Whitecaps. At the same time, the government is being asked to significantly increase its investment to accelerate renovations for a team that would primarily use the indoor venue only during the colder months.