Deprecated values?
Upon visiting an older site it can be common to find deprecated values. Yet as the are [deprecated][1] and not obsolete, they are still valid and supported. A 'good' programmer tends to stay away from these if at all possible, yet just how bad is it to use these?

Upon looking up information about deprecated values, I find the most common information supplied is: 

> Browsers should continue to support deprecated tags and attributes,
> but eventually these tags are **likely** to become obsolete and so future
> support cannot be guaranteed.

Obviously if something breaks you should change it. Yet should we actively change instances of deprecated values in code we had worked on previously? Either a personal site, or a huge site with a huge view rate, just how important is it to stay as up-to-date on accepted values?

How much warning after a tag or attribute becomes deprecated is given when it is decided it will become obsolete? Any? What about other web formats?

On any site, be it an over-haul, or just noticing a line of deprecated code, should it all be actively removed? Or is it worth the saved time and energy to just wait until is is truly dropped and change it all at once?

Should you lazy (like I wish I could be), or is it worth the effort to be that up-to-date?

  [1]: http://www.codehelp.co.uk/html/deprecated.html
Deprecated values?
===

Upon visiting an older site it can be common to find deprecated values. Yet as the are [deprecated][1] and not obsolete, they are still valid and supported. A 'good' programmer tends to stay away from these if at all possible, yet just how bad is it to use these?

Upon looking up information about deprecated values, I find the most common information supplied is: 

> Browsers should continue to support deprecated tags and attributes,
> but eventually these tags are **likely** to become obsolete and so future
> support cannot be guaranteed.

Obviously if something breaks you should change it. Yet should we actively change instances of deprecated values in code we had worked on previously? Either a personal site, or a huge site with a huge view rate, just how important is it to stay as up-to-date on accepted values?

How much warning after a tag or attribute becomes deprecated is given when it is decided it will become obsolete? Any? What about other web formats?

On any site, be it an over-haul, or just noticing a line of deprecated code, should it all be actively removed? Or is it worth the saved time and energy to just wait until is is truly dropped and change it all at once?

Should you lazy (like I wish I could be), or is it worth the effort to be that up-to-date?

  [1]: http://www.codehelp.co.uk/html/deprecated.html