Does L2arc make sense for vm disks?

[RockZhou8]

I've set up a zfs pool on my Proxmox VE home-server.
sdc and sdd are 2x 4TB SATA HDD
sda is a 480G SATA SSD

        NAME        STATE     READ WRITE CKSUM
        pool        ONLINE       0     0     0
          sdc       ONLINE       0     0     0
          sdd       ONLINE       0     0     0
        cache
          sda       ONLINE       0     0     0

And there are 3 VM Disks on the ZFS pool .
pve-vm--100--disk--0.raw
pve-vm--101--disk--0.raw
pve-vm--102--disk--0.raw
Each vm disk size are 1 TB.

Here is the iostat when these 3 VMs are running.

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
          29.65    0.00   19.06   11.99    0.00   39.31
Device            r/s     w/s     rkB/s     wkB/s   rrqm/s   wrqm/s  %rrqm  %wrqm r_await w_await aqu-sz rareq-sz wareq-sz  svctm  %util
sda            355.90   13.30   3896.10   1138.15     0.10     0.00   0.03   0.00    0.66    0.58   0.02    10.95    85.58   0.31  11.60
sdd             24.80   19.10    968.00   1104.00     0.10     0.00   0.40   0.00    8.33    0.94   0.19    39.03    57.80   2.97  13.04
sdc            152.30   16.10   4433.20    876.00     0.30     0.10   0.20   0.62   20.02    1.68   2.82    29.11    54.41   3.06  51.60

sdc %util is 51.60 and iowait is 11.99 ,So I'm wondering that does l2ARC make sense for these vm disks? Or if I need a nvme ssd for cache instead of the SATA ssd.
Any sugguestions? Thanks!
Sorry for my poor English.