We have a number of projects based on ADLA+ADLS Gen1 and we recently noticed that prices for Gen1 are not available here any more. Also ADLA isn't listed in the Gen1->Gen2 migration guide.
Googling brought no relief, so seeking for advise and insights re:
1.As of now, ADLA does not support ADLS Gen2, there is already a user voice here. You can upvote for it.
2.For ADLS Gen1 will be discounted or not, there is a link about this as following:
As of now there are no plans to retire ADLS gen 1. However it's recommended to migrate to Gen2 as most of the latest features and improvements will be rolled out to Gen2.
3.Based on 1, if Microsoft supports 1 as per the user voice, then ADLA will be not retired. But not very sure.
Hope it helps.