"so far" vs so far

Some examples from the web:

• An IAEA note released following the talks states that "so far" agency experts have "had access to all sites they wanted to visit in the country."
• "So far" is a term I'm not comfortable with.
• "So Far Away" was the lead single from Brothers in Arms in the UK and Europe on 8 April 1985.
• Season 9 debuted on October 11, 2018, with an Episode 0 entitled "The Story So Far".
• Continue reading "Assessing the discussion so far"...
• So far "The book" says she's clean.
• Two days earlier he had completed what turned out to be his last poem, "My Literary Career So Far".
• "Lariam" so far has not had huge side effects in me, luckily...
• For the Dutch it is "perfect season" so far, and in fact, leads the championship standings with maximum points (300).
• Thanks to this restoration, another important part of this complex, which remained so far "hidden" and never used, has been brought to light.
• Consider that the frescoes in San Galgano were considered "so far removed" from the religious iconography of the time that the chapel's patrons demanded substantial changes be made shortly after they were completed.
• All right, well, the key phrase there is "so far."
• "So far so good" I thought.
• An ulterior motive is to highlight the "spiritual, historical and cultural patrimony contained in the Holy Land" which so far, "remains the prerogative of a few".
• Originally, the song "So Far So Good" was going to be included on the album so the album started and finished with a new song but it was dropped.
• To give you an example, in both paragraphs 4 and 5 of the Dutch and German versions, the equivalents of the English words: "in so far as" have been omitted.
• Two singles followed afterward in 2005: "So Far Away" and "Colors."
• "So far," he said, "it has undermined both."
• And, the Pope commented, "so many Christians" are like this: "they are good, they go to Mass", but go "only so far" with regard to service.
• Everything sets out from the question with which this Life opens: is Burma far away? Evidently no. It's "not so far from here", like every place on the planet.

Some examples from the web:

• Everything Miss Siddal has done so far.
• Foreign investments have so far amounted to Dh1.4 billion.
• Chief, so far we haven't found any clues.
• Now, this is what we know so far.
• Well, so far, in my book... this establishment is aces.
• Now, you seem to be functioning reasonably well... so far.
• Venezuelan authorities had so far refrained from communicating on this subject.
• Territorial cohesion so far even lacks a clear definition.
• Best guess so far is still Guillain-Barré Syndrome.
• Not a bad voyage so far.
• From what I've seen so far...
• 600 so far, just on our side.
• I been lucky so far, Captain.
• This is my seventh message so far.
• This year, she's written nothing so far.
• I hope your stay with us has been comfortable so far.
• Imperial is 69% for so far.
• You've maintained a perfect record so far.
• You're our ace so far.
• And so far I have te amo.