SMB network shares and symbolic links

Question

I'm experimenting with Samba shares at home and I'm trying to understand how symbolic links work.
I have a few network shares on a couple of machines that run a mix of Windows and Ubuntu or Debian distros.
I'm trying to understand a few things:

• is it possible to allow for the creation of symbolic links (from any client) inside the shares and across shares but not outside shared paths? For example if I have /srv/share1 and /srv/share2 would it be possible to link:

  /srv/share1/link -> /srv/share1/file
  

  and

  /srv/share2/link -> /srv/share1/file
  

  but not any file outside these 2 directories?

• is it possible to make symlinks "transparent" on any client or specific clients when mounting the shares? Are there specific options I should use when mounting them on other machines to see links as such?
  Right now mounting them using cifs shows symlinks as it was a normal files (I didn't set any options using the command beside authentication).
  This answer: Deleting Ubuntu folder symlink deletes target folder's contents when done via OSX & Samba seems to support this behaviour.

• I'd like to get a clearer understanding on which are the pros and cons of various options used to manage links; in particular which are the advantages and disadvantages of:

  [global]
  allow insecure wide links = Yes
  unix extensions = Yes
  wide links = Yes
  

  instead of:

  [global]
  unix extensions = No  # Does this imply UNIX clients cannot create symlinks?
  wide links = Yes
  

  besides the obvious security problem related to allow insecure wide links being turned on.
  The above config is from: https://unix.stackexchange.com/q/5120/181086

A partial answer is given here: creating symbolic links on networked drive but it's related to Windows.
Other answers such as: Ubuntu + latest samba version, symlinks no longer work on share mounted in windows
Creating a Symlink in an NTFS share
aren't really recent and don't go in-depth in the reasons why it does or doesn't work.
Finally this one I didn't understand Samba Linux shares -- Why won't windows machines display/follow symbolic links?.