Windows implementation doesn't consider multiple default GW with different MTUs

[avhitrov]

Real example:

> route print 0.0.0.0
===========================================================================
Interface List
 19...00 05 9a 3c 7a 00 ......Cisco AnyConnect Secure Mobility Client Virtual Miniport Adapter for Windows x64
 37...00 15 5d 0e 76 41 ......Hyper-V Virtual Ethernet Adapter
 21...cc 15 31 1e 58 08 ......Microsoft Wi-Fi Direct Virtual Adapter
  9...ce 15 31 1e 58 07 ......Microsoft Wi-Fi Direct Virtual Adapter #2
  6...cc 15 31 1e 58 07 ......Intel(R) Wi-Fi 6 AX201 160MHz
 17...cc 15 31 1e 58 0b ......Bluetooth Device (Personal Area Network)
  1...........................Software Loopback Interface 1
===========================================================================

IPv4 Route Table
===========================================================================
Active Routes:
Network Destination        Netmask          Gateway       Interface  Metric
          0.0.0.0          0.0.0.0    192.168.100.1   192.168.100.74     50
          0.0.0.0          0.0.0.0       10.21.38.1      10.21.38.97      2
===========================================================================
Persistent Routes:
  None

IPv6 Route Table
===========================================================================
Active Routes:
  None
Persistent Routes:
  None

I think in this case some metric comparison needed