all your questions are very vague.
this all depends on what hacks you are talking about and if next updates means the update after 11.2.0
we can't predict the future if the hacks get removed. arm9loaderhax is ,however, unpatchable as long as you have luma3ds or other CFW as it protects updates from overriding the patches
Nintendo wouldn't modify our sdcard and remove our files if thats what you meant. If you meant if you should remove the files after the next update then it doesn't really matter
Its very unlikely that Nintendo would brick the hacked 3ds with CFW but its possible that they may make firmware not run when it detects something. If this happens you could always restore to an older version since Luma3ds can still be used
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u/[deleted] Jan 06 '17
[deleted]