the storage and the pipes are the most valuable thing, since gas is just a commodity.
Add another supplier, load it up, use pre-existing storage and distribution, Gazprom replaced.
This is also why this is so dangerous from a legal perspective. Gazprom probably spent a great deal building this network and storage. Only to have it seized....
That is a disadvantage, but pipelines are very valuable. For example, Russia would love to sell gas to China, which would love to buy it, but pipelines take a heck of a long time to build. And regional, lower volume pipelines can be a nightmare to build.
To me it seems that actually the reason for the seizure was that Gazprom did not store enough gas, while they have the biggest capacity:
> In Germany, a third of gas storage belongs to Russia's Gazprom (GAZP.MM), whose facilities in Germany had lower levels of stored gas this winter than those operated by other companies.
A plausible scenario but probably won’t happen in this case, Could be more like overseas subsidiaries of Bayer, seized by various allied countries in WWI and only reunited in 1994.
The reparations bill (both during and after the war) will be high and I assume various assets, including foreign currency reserves, will end up going to fund the reconstruction of Ukraine.