In Minecraft Snapshot 24w09a, NBT has been replaced by components.
Unstructured NBT data attached to stacks of items (tag field) has been replaced with structured 'components'

Enabling Advanced Tooltips shows you how much NBT/components a block has.
Ctrl+Picking a chest in older versions would say NBT: x tag(s) and (+NBT).Ctrl+Picking a chest in 24w09a has replaced the NBT: x tag(s) with x component(s), but it still says (+NBT)

1.20.4:

24w09a:

Steps to replicate

1.  Place a chest
2. Press middle mouse button and Ctrl
3. Enable advanced tooltips (F3+H)
4. Look at the chest item in your inventory in different versions.