So I did a thing: (Got my JS3 glider to over 50,000 feet)

[EPPRglider81]

Well high temperature affecting thermals is a thing known and exploited by MSFS gliding community at least since october 2021 - around SU5, way before official gliders have been implemented - see this post| at MS Flight Simulator Gliders facebook group.
Since than countless hours were spent by the community trying to reverse engineer how MSFS weather model works, what and how it is wrong and what needs to be fixed.

See posts/threads like:

Errors of AMBIENT WIND Y dependencies on the values of flight conditions and terrain settings in SU11

SimVar AMBIENT WIND Y is a derivative of simvar AMBIENT WIND VELOCITY and depends collectively on several variable weather settings and flight terrain. In MSFS2020, after SU11, there are three types of simvar AMBIENT WIND Y value formation, which are: Cloud thermals, Terrestrial thermals and Terrain Slope (see Figure 0.). [0] Cloud thermals form the values of simvar AMBIENT WIND Y in the presence of clouds of the lower layer such as Cumulus clouds (Cumulus, Cu) and Cumulonimbus (Cumulonimbus,…

https://forums.flightsimulator.com/t/incoming-soaring-feedback-on-the-su12-weather-update/576965

Incorrect spatial relations between thermals and Cu clouds makes realistic glider flights impossible

Thank you using the Bug section, using templates provided will greatly help the team reproducing the issue and ease the process of fixing it. Are you using Developer Mode or made changes in it? no Have you disabled/removed all your mods and addons? Yes, retested with official gliders Brief description of the issue: Incorrect placement of thermals in relation to Cu clouds (experienced both with weather presets and live weather), as detailed on the picture below makes realistic g…

Thermals, Up & Downdrafts - More Realism Updates

As the top voted Thermals, Up & Downdrafts - Realism Update/ Airmass Simulation got moved out of the wishlist section, closed and marked as resolved for no reason, I reopen this thread right here because it’s far from beeing ‘‘resolved’’. As pointed out in the Beta Forum, there are still many more updates needed if they want to call it realistic. Let’s Vote and continue the wishlist what they need to improve right here. relation between clouds and thermals needed: height, position, size s…

Too small distances between thermals suitable for gliding

Thank you using the Bug section, using templates provided will greatly help the team reproducing the issue and ease the process of fixing it. Are you using Developer Mode or made changes in it? No for testing, yes during reporting for position Have you disabled/removed all your mods and addons? yes Brief description of the issue: Significant problem that discourages a lot of people from using MSFS for gliding is too low spacing/distances between thermals and that those thermals…

Regression: Cloud thermals lost strength

The thermals connected to clouds have lost strength over the course of the past few Sim Updates. At the moment we have to set up unrealistic conditions with very dense and high clouds to find good enough conditions to fly gliders. In Sim Update 9 gliders were able to use clouds to identify thermals and fly long distances. After SU10, 11 and 12 beta, we have lost the ability to use reasonably sized clouds to identify thermals when gliding. [image] Regression of cloud thermal…

And probably many more

I suggest you read everything MSGamerTag01 wrote about weather as he has huge RL gliding experience and also been programming gliding addons to MSFS since many years.

Also worth joining is Sim Soaring Club at Discord where some weather discussion takes place.