rarely spotted units

Just wondering what you think the most uncommon units are in your experience? including seasons.

Ive NEVER seen anyone use loitering munitions although they look useful. Also the UGV thing but that does not look so useful. NEVER seen naval Awacs used.It just seems like a waste of time unlesss they start making it spot subs.

Amphib AFV: I have built then before as great in jungles and has airdrop and scout on lvl 3, but a bit overpriced. Rarely seen.

Commandos look neat but you have to unlock via SAS so too much reaearch? rarely seen.

Do you use any of these or think they meed fixing?