I say it depends because there's really no standing ground with them in the Commonwealth. The Minutemen only see them as useful when it comes to hacking & stealth. While the BOS see them as the children of Atom only they're worshipping synths. Worst part is even some synths see the Railroad 's ideals as heavily flawed if not a burden. As the synths in Arcadia will be highly displeazed upon Boxer attempting to persuade the residents to work with the Railroad. Kasumi who's having a identity crisis nor Dima a highly intelligent synth doesn't bother to try and reach out to the "Synth Saviors".
Thsys why for my playthrough I did the MM ending in a technical allaonce with the BOS . Ad for the Railroad they use one safehouse with operations solely sent to outside the Commonwealth and Arcadia. As Arcadia is proven to be more sustainable vs the many HQs the Raikroad has had to foster. All in all rhe Railroad cna thank Deacon for it's survival as I couldn't bear losing him as a companion.
