After thinking about this, I changed my mind and was going to delete the 
question. 
THANKS for the thoughtful response.

On Sunday, August 11, 2019 at 2:06:29 PM UTC-4, Rafael França wrote:
>
> No. They should not. They are only required if you use one of those cache 
> stores. They are not used by default when you generate a new Rails 
> application.
>
> Sent from my iPhone
>
> On Aug 11, 2019, at 14:04, Al <jas...@gmail.com <javascript:>> wrote:
>
> 
> Should dalli and redis gems be standard issue (part of "rails new") since 
> they are "require"d?
>    
>    - activesupport-5.2.3/lib/active_support/cache/redis_cache_store.rb: 
> require 
>    "redis"
>    - 
>    - 
>    
> actionpack-5.2.3/lib/action_dispatch/middleware/session/mem_cache_store.rb: 
> require 
>    "rack/session/dalli"
>    - 
>    - activesupport-5.2.3/lib/active_support/cache/mem_cache_store.rb: require 
>    "dalli"
>
> Also see error message elsewhere in the code
>
>    - 
>    
> actionpack-5.2.3/lib/action_dispatch/middleware/session/mem_cache_store.rb: 
> $stderr.puts 
>    "You don't have dalli installed in your application. Please add it to 
>    your Gemfile and run bundle install"
>    - activesupport-5.2.3/lib/active_support/cache/mem_cache_store.rb: 
>    $stderr.puts "You don't have dalli installed in your application. Please 
>    add it to your Gemfile and run bundle install"
>
>
> Thanks,
> Al
>
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